90910901 has 4 divisors (see below), whose sum is σ = 93025152. Its totient is φ = 88796652.

The previous prime is 90910889. The next prime is 90910921. The reversal of 90910901 is 10901909.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90910901 - 2¹⁰ = 90909877 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 (90910921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1057061 + ... + 1057146.

It is an arithmetic number, because the mean of its divisors is an integer number (23256288).

Almost surely, 2^90910901 is an apocalyptic number.

It is an amenable number.

90910901 is a deficient number, since it is larger than the sum of its proper divisors (2114251).

90910901 is a wasteful number, since it uses less digits than its factorization.

90910901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114250.

The product of its (nonzero) digits is 729, while the sum is 29.

The square root of 90910901 is about 9534.7208139515. The cubic root of 90910901 is about 449.6472972921.

The spelling of 90910901 in words is "ninety million, nine hundred ten thousand, nine hundred one".