90902101 has 4 divisors (see below), whose sum is σ = 91068832. Its totient is φ = 90735372.

The previous prime is 90902087. The next prime is 90902113. The reversal of 90902101 is 10120909.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10120909 = 449 ⋅22541.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90902101 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 (90902131) 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, 82545 + ... + 83638.

It is an arithmetic number, because the mean of its divisors is an integer number (22767208).

Almost surely, 2^90902101 is an apocalyptic number.

It is an amenable number.

90902101 is a deficient number, since it is larger than the sum of its proper divisors (166731).

90902101 is a wasteful number, since it uses less digits than its factorization.

90902101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166730.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 90902101 is about 9534.2593314845. The cubic root of 90902101 is about 449.6327884934.

The spelling of 90902101 in words is "ninety million, nine hundred two thousand, one hundred one".