90031121469 has 12 divisors (see below), whose sum is σ = 130048214400. Its totient is φ = 60019242504.

The previous prime is 90031121459. The next prime is 90031121483. The reversal of 90031121469 is 96412113009.

It is a happy number.

It is not a de Polignac number, because 90031121469 - 2⁵ = 90031121437 is a prime.

It is a super-2 number, since 2×90031121469² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90031121459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347092 + ... + 548210.

It is an arithmetic number, because the mean of its divisors is an integer number (10837351200).

Almost surely, 2^90031121469 is an apocalyptic number.

It is an amenable number.

90031121469 is a deficient number, since it is larger than the sum of its proper divisors (40017092931).

90031121469 is a wasteful number, since it uses less digits than its factorization.

90031121469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250864 (or 250861 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The spelling of 90031121469 in words is "ninety billion, thirty-one million, one hundred twenty-one thousand, four hundred sixty-nine".