90090121769 has 8 divisors (see below), whose sum is σ = 90780482688. Its totient is φ = 89401557600.

The previous prime is 90090121733. The next prime is 90090121789. The reversal of 90090121769 is 96712109009.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90090121769 - 2²⁴ = 90073344553 is a prime.

It is a super-2 number, since 2×90090121769² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90090121789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348437 + ... + 549170.

It is an arithmetic number, because the mean of its divisors is an integer number (11347560336).

Almost surely, 2^90090121769 is an apocalyptic number.

It is an amenable number.

90090121769 is a deficient number, since it is larger than the sum of its proper divisors (690360919).

90090121769 is a wasteful number, since it uses less digits than its factorization.

90090121769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898375.

The product of its (nonzero) digits is 61236, while the sum is 44.

The spelling of 90090121769 in words is "ninety billion, ninety million, one hundred twenty-one thousand, seven hundred sixty-nine".