90991202 has 8 divisors (see below), whose sum is σ = 136683612. Its totient is φ = 45430000.

The previous prime is 90991193. The next prime is 90991213. The reversal of 90991202 is 20219909.

It can be written as a sum of positive squares in 2 ways, for example, as 77070841 + 13920361 = 8779^2 + 3731^2 .

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

It is an unprimeable number.

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, 31049 + ... + 33852.

Almost surely, 2^90991202 is an apocalyptic number.

90991202 is a deficient number, since it is larger than the sum of its proper divisors (45692410).

90991202 is a wasteful number, since it uses less digits than its factorization.

90991202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65604.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 90991202 is about 9538.9308625233. The cubic root of 90991202 is about 449.7796484967.

It can be divided in two parts, 9099 and 1202, that added together give a palindrome (10301).

The spelling of 90991202 in words is "ninety million, nine hundred ninety-one thousand, two hundred two".