90915901 has 16 divisors (see below), whose sum is σ = 96864768. Its totient is φ = 85190400.

The previous prime is 90915887. The next prime is 90915911. The reversal of 90915901 is 10951909.

It is a cyclic number.

It is not a de Polignac number, because 90915901 - 2¹⁷ = 90784829 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 (90915911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 295990 + ... + 296296.

It is an arithmetic number, because the mean of its divisors is an integer number (6054048).

Almost surely, 2^90915901 is an apocalyptic number.

It is an amenable number.

90915901 is a deficient number, since it is larger than the sum of its proper divisors (5948867).

90915901 is a wasteful number, since it uses less digits than its factorization.

90915901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612.

The product of its (nonzero) digits is 3645, while the sum is 34.

The square root of 90915901 is about 9534.9830099482. The cubic root of 90915901 is about 449.6555405106.

The spelling of 90915901 in words is "ninety million, nine hundred fifteen thousand, nine hundred one".