90640495 has 24 divisors (see below), whose sum is σ = 120255408. Its totient is φ = 65535360.

The previous prime is 90640489. The next prime is 90640499. The reversal of 90640495 is 59404609.

It is not a de Polignac number, because 90640495 - 2¹⁷ = 90509423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90640499) 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, 140644 + ... + 141286.

It is an arithmetic number, because the mean of its divisors is an integer number (5010642).

Almost surely, 2^90640495 is an apocalyptic number.

90640495 is a deficient number, since it is larger than the sum of its proper divisors (29614913).

90640495 is a wasteful number, since it uses less digits than its factorization.

90640495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 892 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 90640495 is about 9520.5301848164. The cubic root of 90640495 is about 449.2010432295.

The spelling of 90640495 in words is "ninety million, six hundred forty thousand, four hundred ninety-five".