90917769 has 16 divisors (see below), whose sum is σ = 125092352. Its totient is φ = 58693248.

The previous prime is 90917759. The next prime is 90917807. The reversal of 90917769 is 96771909.

It is not a de Polignac number, because 90917769 - 2⁹ = 90917257 is a prime.

It is a super-2 number, since 2×90917769² = 16532081439874722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90917759) 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, 22917 + ... + 26589.

It is an arithmetic number, because the mean of its divisors is an integer number (7818272).

Almost surely, 2^90917769 is an apocalyptic number.

It is an amenable number.

90917769 is a deficient number, since it is larger than the sum of its proper divisors (34174583).

90917769 is a wasteful number, since it uses less digits than its factorization.

90917769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3936.

The product of its (nonzero) digits is 214326, while the sum is 48.

The square root of 90917769 is about 9535.0809645225. The cubic root of 90917769 is about 449.6586200995.

The spelling of 90917769 in words is "ninety million, nine hundred seventeen thousand, seven hundred sixty-nine".