90687530 has 8 divisors (see below), whose sum is σ = 163237572. Its totient is φ = 36275008.

The previous prime is 90687517. The next prime is 90687539. The reversal of 90687530 is 3578609.

It is a Cunningham number, because it is equal to 9523²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 90687529 + 1 = 9523^2 + 1^2 .

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

It is not an unprimeable number, because it can be changed into a prime (90687539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4534367 + ... + 4534386.

Almost surely, 2^90687530 is an apocalyptic number.

90687530 is a deficient number, since it is larger than the sum of its proper divisors (72550042).

90687530 is a wasteful number, since it uses less digits than its factorization.

90687530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9068760.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 90687530 is about 9523.0000525045. Note that the first 4 decimals coincide. The cubic root of 90687530 is about 449.2787293216.

It can be divided in two parts, 90687 and 530, that multiplied together give a triangular number (48064110 = T₉₈₀₄).

The spelling of 90687530 in words is "ninety million, six hundred eighty-seven thousand, five hundred thirty".