90517901 has 4 divisors (see below), whose sum is σ = 90770400. Its totient is φ = 90265404.

The previous prime is 90517897. The next prime is 90517907. The reversal of 90517901 is 10971509.

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 90517901 - 2² = 90517897 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 (90517907) 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, 125711 + ... + 126428.

It is an arithmetic number, because the mean of its divisors is an integer number (22692600).

Almost surely, 2^90517901 is an apocalyptic number.

It is an amenable number.

90517901 is a deficient number, since it is larger than the sum of its proper divisors (252499).

90517901 is a wasteful number, since it uses less digits than its factorization.

90517901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252498.

The product of its (nonzero) digits is 2835, while the sum is 32.

The square root of 90517901 is about 9514.0896043710. The cubic root of 90517901 is about 448.9984325420.

The spelling of 90517901 in words is "ninety million, five hundred seventeen thousand, nine hundred one".