501238087 has 4 divisors (see below), whose sum is σ = 572843536. Its totient is φ = 429632640.

The previous prime is 501238027. The next prime is 501238097. The reversal of 501238087 is 780832105.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-501238087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501238027) 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, 35802714 + ... + 35802727.

It is an arithmetic number, because the mean of its divisors is an integer number (143210884).

Almost surely, 2^501238087 is an apocalyptic number.

501238087 is a deficient number, since it is larger than the sum of its proper divisors (71605449).

501238087 is an equidigital number, since it uses as much as digits as its factorization.

501238087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71605448.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 501238087 is about 22388.3471252346. The cubic root of 501238087 is about 794.3550995371.

The spelling of 501238087 in words is "five hundred one million, two hundred thirty-eight thousand, eighty-seven".