91002002 has 32 divisors (see below), whose sum is σ = 169610112. Its totient is φ = 35656704.

The previous prime is 91001993. The next prime is 91002059. The reversal of 91002002 is 20020019.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17138 + ... + 21810.

It is an arithmetic number, because the mean of its divisors is an integer number (5300316).

Almost surely, 2^91002002 is an apocalyptic number.

91002002 is a deficient number, since it is larger than the sum of its proper divisors (78608110).

91002002 is a wasteful number, since it uses less digits than its factorization.

91002002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4802.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 91002002 is about 9539.4969469045. The cubic root of 91002002 is about 449.7974429937.

The spelling of 91002002 in words is "ninety-one million, two thousand, two".