50391687 has 8 divisors (see below), whose sum is σ = 67383936. Its totient is φ = 33496952.

The previous prime is 50391631. The next prime is 50391703. The reversal of 50391687 is 78619305.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 50391687 - 2⁶ = 50391623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50391787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23163 + ... + 25244.

It is an arithmetic number, because the mean of its divisors is an integer number (8422992).

Almost surely, 2^50391687 is an apocalyptic number.

50391687 is a deficient number, since it is larger than the sum of its proper divisors (16992249).

50391687 is a wasteful number, since it uses less digits than its factorization.

50391687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48757.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 50391687 is about 7098.7102349652. The cubic root of 50391687 is about 369.3626402397.

The spelling of 50391687 in words is "fifty million, three hundred ninety-one thousand, six hundred eighty-seven".