68064431 has 4 divisors (see below), whose sum is σ = 68104512. Its totient is φ = 68024352.

The previous prime is 68064427. The next prime is 68064439. The reversal of 68064431 is 13446086.

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

It is a cyclic number.

It is not a de Polignac number, because 68064431 - 2² = 68064427 is a prime.

It is a super-2 number, since 2×68064431² = 9265533534707522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68064439) 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 3 ways as a sum of consecutive naturals, for example, 17375 + ... + 20928.

It is an arithmetic number, because the mean of its divisors is an integer number (17026128).

Almost surely, 2^68064431 is an apocalyptic number.

68064431 is a deficient number, since it is larger than the sum of its proper divisors (40081).

68064431 is a wasteful number, since it uses less digits than its factorization.

68064431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40080.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 68064431 is about 8250.1170294730. The cubic root of 68064431 is about 408.2943837715.

The spelling of 68064431 in words is "sixty-eight million, sixty-four thousand, four hundred thirty-one".