68111431 has 2 divisors, whose sum is σ = 68111432. Its totient is φ = 68111430.

The previous prime is 68111389. The next prime is 68111443. The reversal of 68111431 is 13411186.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68111431 - 2¹¹ = 68109383 is a prime.

It is a super-2 number, since 2×68111431² = 9278334065735522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68111396 and 68111405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68211431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34055715 + 34055716.

It is an arithmetic number, because the mean of its divisors is an integer number (34055716).

Almost surely, 2^68111431 is an apocalyptic number.

68111431 is a deficient number, since it is larger than the sum of its proper divisors (1).

68111431 is an equidigital number, since it uses as much as digits as its factorization.

68111431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 68111431 is about 8252.9649823563. The cubic root of 68111431 is about 408.3883409258.

The spelling of 68111431 in words is "sixty-eight million, one hundred eleven thousand, four hundred thirty-one".