90390901 has 4 divisors (see below), whose sum is σ = 91480032. Its totient is φ = 89301772.

The previous prime is 90390871. The next prime is 90390919. The reversal of 90390901 is 10909309.

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 90390901 - 2⁵ = 90390869 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 (90370901) 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, 544441 + ... + 544606.

It is an arithmetic number, because the mean of its divisors is an integer number (22870008).

Almost surely, 2^90390901 is an apocalyptic number.

It is an amenable number.

90390901 is a deficient number, since it is larger than the sum of its proper divisors (1089131).

90390901 is a wasteful number, since it uses less digits than its factorization.

90390901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089130.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 90390901 is about 9507.4129499039. The cubic root of 90390901 is about 448.7883470617.

The spelling of 90390901 in words is "ninety million, three hundred ninety thousand, nine hundred one".