68564913 has 8 divisors (see below), whose sum is σ = 92707776. Its totient is φ = 45066000.

The previous prime is 68564891. The next prime is 68564921. The reversal of 68564913 is 31946586.

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

It is not a de Polignac number, because 68564913 - 2⁹ = 68564401 is a prime.

It is a super-2 number, since 2×68564913² = 9402294589395138, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68564413) 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, 160738 + ... + 161163.

It is an arithmetic number, because the mean of its divisors is an integer number (11588472).

Almost surely, 2^68564913 is an apocalyptic number.

It is an amenable number.

68564913 is a deficient number, since it is larger than the sum of its proper divisors (24142863).

68564913 is a wasteful number, since it uses less digits than its factorization.

68564913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321975.

The product of its digits is 155520, while the sum is 42.

The square root of 68564913 is about 8280.3932877612. The cubic root of 68564913 is about 409.2926789234.

The spelling of 68564913 in words is "sixty-eight million, five hundred sixty-four thousand, nine hundred thirteen".