50691439 has 4 divisors (see below), whose sum is σ = 51031800. Its totient is φ = 50351080.

The previous prime is 50691437. The next prime is 50691481. The reversal of 50691439 is 93419605.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93419605 = 5 ⋅18683921.

It is a cyclic number.

It is not a de Polignac number, because 50691439 - 2¹ = 50691437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50691398 and 50691407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50691437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169957 + ... + 170254.

It is an arithmetic number, because the mean of its divisors is an integer number (12757950).

Almost surely, 2^50691439 is an apocalyptic number.

50691439 is a deficient number, since it is larger than the sum of its proper divisors (340361).

50691439 is a wasteful number, since it uses less digits than its factorization.

50691439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340360.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 50691439 is about 7119.7920615703. The cubic root of 50691439 is about 370.0935701989.

The spelling of 50691439 in words is "fifty million, six hundred ninety-one thousand, four hundred thirty-nine".