68924431 has 2 divisors, whose sum is σ = 68924432. Its totient is φ = 68924430.

The previous prime is 68924393. The next prime is 68924447. The reversal of 68924431 is 13442986.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68924431 is a prime.

It is a super-2 number, since 2×68924431² = 9501154377347522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68924831) 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, 34462215 + 34462216.

It is an arithmetic number, because the mean of its divisors is an integer number (34462216).

Almost surely, 2^68924431 is an apocalyptic number.

68924431 is a deficient number, since it is larger than the sum of its proper divisors (1).

68924431 is an equidigital number, since it uses as much as digits as its factorization.

68924431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 68924431 is about 8302.0738975271. The cubic root of 68924431 is about 410.0068033771.

The spelling of 68924431 in words is "sixty-eight million, nine hundred twenty-four thousand, four hundred thirty-one".