90131649 has 8 divisors (see below), whose sum is σ = 126500640. Its totient is φ = 56925216.

The previous prime is 90131647. The next prime is 90131669. The reversal of 90131649 is 94613109.

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

It is not a de Polignac number, because 90131649 - 2¹ = 90131647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90131647) 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, 790572 + ... + 790685.

It is an arithmetic number, because the mean of its divisors is an integer number (15812580).

Almost surely, 2^90131649 is an apocalyptic number.

It is an amenable number.

90131649 is a deficient number, since it is larger than the sum of its proper divisors (36368991).

90131649 is a wasteful number, since it uses less digits than its factorization.

90131649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581279.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 90131649 is about 9493.7689565314. The cubic root of 90131649 is about 448.3588765161.

The spelling of 90131649 in words is "ninety million, one hundred thirty-one thousand, six hundred forty-nine".