68490030431 has 2 divisors, whose sum is σ = 68490030432. Its totient is φ = 68490030430.

The previous prime is 68490030419. The next prime is 68490030439. The reversal of 68490030431 is 13403009486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68490030431 - 2³⁰ = 67416288607 is a prime.

It is a super-2 number, since 2×68490030431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68490030439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34245015215 + 34245015216.

It is an arithmetic number, because the mean of its divisors is an integer number (34245015216).

Almost surely, 2^68490030431 is an apocalyptic number.

68490030431 is a deficient number, since it is larger than the sum of its proper divisors (1).

68490030431 is an equidigital number, since it uses as much as digits as its factorization.

68490030431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 68490030431 in words is "sixty-eight billion, four hundred ninety million, thirty thousand, four hundred thirty-one".