90641759 has 12 divisors (see below), whose sum is σ = 99346296. Its totient is φ = 82210128.

The previous prime is 90641741. The next prime is 90641779. The reversal of 90641759 is 95714609.

It is not a de Polignac number, because 90641759 - 2⁸ = 90641503 is a prime.

It is a super-2 number, since 2×90641759² = 16431856949228162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90641779) 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, 44252 + ... + 46254.

It is an arithmetic number, because the mean of its divisors is an integer number (8278858).

Almost surely, 2^90641759 is an apocalyptic number.

90641759 is a deficient number, since it is larger than the sum of its proper divisors (8704537).

90641759 is a wasteful number, since it uses less digits than its factorization.

90641759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134 (or 2075 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 90641759 is about 9520.5965674426. The cubic root of 90641759 is about 449.2031312862.

The spelling of 90641759 in words is "ninety million, six hundred forty-one thousand, seven hundred fifty-nine".