68520931 has 8 divisors (see below), whose sum is σ = 73034784. Its totient is φ = 64060800.

The previous prime is 68520919. The next prime is 68520941. The reversal of 68520931 is 13902586.

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 68520931 - 2¹³ = 68512739 is a prime.

It is a super-2 number, since 2×68520931² = 9390235970213522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68520901) 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 7 ways as a sum of consecutive naturals, for example, 10780 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (9129348).

Almost surely, 2^68520931 is an apocalyptic number.

68520931 is a deficient number, since it is larger than the sum of its proper divisors (4513853).

68520931 is a wasteful number, since it uses less digits than its factorization.

68520931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26861.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 68520931 is about 8277.7370699968. The cubic root of 68520931 is about 409.2051445451.

The spelling of 68520931 in words is "sixty-eight million, five hundred twenty thousand, nine hundred thirty-one".