90087691413 has 16 divisors (see below), whose sum is σ = 122966268480. Its totient is φ = 58635058944.

The previous prime is 90087691411. The next prime is 90087691481. The reversal of 90087691413 is 31419678009.

It is a happy number.

It is not a de Polignac number, because 90087691413 - 2¹ = 90087691411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90087691411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127693 + ... + 443261.

It is an arithmetic number, because the mean of its divisors is an integer number (7685391780).

Almost surely, 2^90087691413 is an apocalyptic number.

It is an amenable number.

90087691413 is a deficient number, since it is larger than the sum of its proper divisors (32878577067).

90087691413 is a wasteful number, since it uses less digits than its factorization.

90087691413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317828.

The product of its (nonzero) digits is 326592, while the sum is 48.

The spelling of 90087691413 in words is "ninety billion, eighty-seven million, six hundred ninety-one thousand, four hundred thirteen".