90849665 has 8 divisors (see below), whose sum is σ = 109201128. Its totient is φ = 72558720.

The previous prime is 90849653. The next prime is 90849667. The reversal of 90849665 is 56694809.

It can be written as a sum of positive squares in 4 ways, for example, as 4879681 + 85969984 = 2209^2 + 9272^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-90849665 is a prime.

It is a super-2 number, since 2×90849665² = 16507323261224450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90849667) 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, 11756 + ... + 17885.

It is an arithmetic number, because the mean of its divisors is an integer number (13650141).

Almost surely, 2^90849665 is an apocalyptic number.

It is an amenable number.

90849665 is a deficient number, since it is larger than the sum of its proper divisors (18351463).

90849665 is a wasteful number, since it uses less digits than its factorization.

90849665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30259.

The product of its (nonzero) digits is 466560, while the sum is 47.

The square root of 90849665 is about 9531.5090620531. The cubic root of 90849665 is about 449.5463164190.

The spelling of 90849665 in words is "ninety million, eight hundred forty-nine thousand, six hundred sixty-five".