90708691351 has 4 divisors (see below), whose sum is σ = 90718628112. Its totient is φ = 90698754592.

The previous prime is 90708691319. The next prime is 90708691441. The reversal of 90708691351 is 15319680709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15319680709 = 41 ⋅373650749.

It is a cyclic number.

It is not a de Polignac number, because 90708691351 - 2⁵ = 90708691319 is a prime.

It is a super-2 number, since 2×90708691351² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90708691295 and 90708691304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90708691301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4954675 + ... + 4972948.

It is an arithmetic number, because the mean of its divisors is an integer number (22679657028).

Almost surely, 2^90708691351 is an apocalyptic number.

90708691351 is a deficient number, since it is larger than the sum of its proper divisors (9936761).

90708691351 is an equidigital number, since it uses as much as digits as its factorization.

90708691351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9936760.

The product of its (nonzero) digits is 408240, while the sum is 49.

The spelling of 90708691351 in words is "ninety billion, seven hundred eight million, six hundred ninety-one thousand, three hundred fifty-one".