90990501 has 24 divisors (see below), whose sum is σ = 141489504. Its totient is φ = 51861600.

The previous prime is 90990479. The next prime is 90990503. The reversal of 90990501 is 10509909.

It is not a de Polignac number, because 90990501 - 2⁵ = 90990469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90990503) 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, 102606 + ... + 103488.

It is an arithmetic number, because the mean of its divisors is an integer number (5895396).

Almost surely, 2^90990501 is an apocalyptic number.

It is an amenable number.

90990501 is a deficient number, since it is larger than the sum of its proper divisors (50499003).

90990501 is a wasteful number, since it uses less digits than its factorization.

90990501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601 (or 1594 counting only the distinct ones).

The product of its (nonzero) digits is 3645, while the sum is 33.

The square root of 90990501 is about 9538.8941182927. The cubic root of 90990501 is about 449.7784934534.

The spelling of 90990501 in words is "ninety million, nine hundred ninety thousand, five hundred one".