91121602 has 64 divisors (see below), whose sum is σ = 168537600. Its totient is φ = 36391680.

The previous prime is 91121599. The next prime is 91121609. The reversal of 91121602 is 20612119.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (91121609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 835924 + ... + 836032.

It is an arithmetic number, because the mean of its divisors is an integer number (2633400).

Almost surely, 2^91121602 is an apocalyptic number.

91121602 is a deficient number, since it is larger than the sum of its proper divisors (77415998).

91121602 is a wasteful number, since it uses less digits than its factorization.

91121602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 91121602 is about 9545.7635629634. The cubic root of 91121602 is about 449.9944065148.

The spelling of 91121602 in words is "ninety-one million, one hundred twenty-one thousand, six hundred two".