68442431 has 2 divisors, whose sum is σ = 68442432. Its totient is φ = 68442430.

The previous prime is 68442397. The next prime is 68442487. The reversal of 68442431 is 13424486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68442431 - 2¹⁰ = 68441407 is a prime.

It is a super-2 number, since 2×68442431² = 9368732722379522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68442131) 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 as a sum of consecutive naturals, namely, 34221215 + 34221216.

It is an arithmetic number, because the mean of its divisors is an integer number (34221216).

Almost surely, 2^68442431 is an apocalyptic number.

68442431 is a deficient number, since it is larger than the sum of its proper divisors (1).

68442431 is an equidigital number, since it uses as much as digits as its factorization.

68442431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 32.

The square root of 68442431 is about 8272.9940771162. The cubic root of 68442431 is about 409.0488182074.

The spelling of 68442431 in words is "sixty-eight million, four hundred forty-two thousand, four hundred thirty-one".