90825665 has 24 divisors (see below), whose sum is σ = 127244520. Its totient is φ = 62055168.

The previous prime is 90825661. The next prime is 90825673. The reversal of 90825665 is 56652809.

It can be written as a sum of positive squares in 4 ways, for example, as 1787569 + 89038096 = 1337^2 + 9436^2 .

It is not a de Polignac number, because 90825665 - 2² = 90825661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90825661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94829 + ... + 95781.

It is an arithmetic number, because the mean of its divisors is an integer number (5301855).

Almost surely, 2^90825665 is an apocalyptic number.

It is an amenable number.

90825665 is a deficient number, since it is larger than the sum of its proper divisors (36418855).

90825665 is a wasteful number, since it uses less digits than its factorization.

90825665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 90825665 is about 9530.2499967210. The cubic root of 90825665 is about 449.5067269800.

The spelling of 90825665 in words is "ninety million, eight hundred twenty-five thousand, six hundred sixty-five".