90202901 has 8 divisors (see below), whose sum is σ = 98590464. Its totient is φ = 82157760.

The previous prime is 90202891. The next prime is 90202909. The reversal of 90202901 is 10920209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90202901 - 2²⁶ = 23094037 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 (90202909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85055 + ... + 86108.

It is an arithmetic number, because the mean of its divisors is an integer number (12323808).

Almost surely, 2^90202901 is an apocalyptic number.

It is an amenable number.

90202901 is a deficient number, since it is larger than the sum of its proper divisors (8387563).

90202901 is a wasteful number, since it uses less digits than its factorization.

90202901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171211.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 90202901 is about 9497.5207817619. The cubic root of 90202901 is about 448.4769928214.

The spelling of 90202901 in words is "ninety million, two hundred two thousand, nine hundred one".