90688965739 has 2 divisors, whose sum is σ = 90688965740. Its totient is φ = 90688965738.

The previous prime is 90688965691. The next prime is 90688965743. The reversal of 90688965739 is 93756988609.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90688965739 - 2⁷ = 90688965611 is a prime.

It is a super-2 number, since 2×90688965739² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90688965769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45344482869 + 45344482870.

It is an arithmetic number, because the mean of its divisors is an integer number (45344482870).

Almost surely, 2^90688965739 is an apocalyptic number.

90688965739 is a deficient number, since it is larger than the sum of its proper divisors (1).

90688965739 is an equidigital number, since it uses as much as digits as its factorization.

90688965739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176359680, while the sum is 70.

The spelling of 90688965739 in words is "ninety billion, six hundred eighty-eight million, nine hundred sixty-five thousand, seven hundred thirty-nine".