50670391 has 4 divisors (see below), whose sum is σ = 50687784. Its totient is φ = 50653000.

The previous prime is 50670379. The next prime is 50670401. The reversal of 50670391 is 19307605.

50670391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19307605 = 5 ⋅3861521.

It is a 3-Lehmer number, since φ(50670391) divides (50670391-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50670391 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50670331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3145 + ... + 10546.

It is an arithmetic number, because the mean of its divisors is an integer number (12671946).

Almost surely, 2^50670391 is an apocalyptic number.

50670391 is a deficient number, since it is larger than the sum of its proper divisors (17393).

50670391 is a wasteful number, since it uses less digits than its factorization.

50670391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17392.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 50670391 is about 7118.3137750453. The cubic root of 50670391 is about 370.0423399320.

Adding to 50670391 its reverse (19307605), we get a palindrome (69977996).

The spelling of 50670391 in words is "fifty million, six hundred seventy thousand, three hundred ninety-one".