91020602 has 8 divisors (see below), whose sum is σ = 143716800. Its totient is φ = 43115004.

The previous prime is 91020599. The next prime is 91020617. The reversal of 91020602 is 20602019.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1197602 + ... + 1197677.

It is an arithmetic number, because the mean of its divisors is an integer number (17964600).

Almost surely, 2^91020602 is an apocalyptic number.

91020602 is a deficient number, since it is larger than the sum of its proper divisors (52696198).

91020602 is a wasteful number, since it uses less digits than its factorization.

91020602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2395300.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 91020602 is about 9540.4717912690. The cubic root of 91020602 is about 449.8280857720.

It can be divided in two parts, 910 and 20602, that added together give a palindrome (21512).

The spelling of 91020602 in words is "ninety-one million, twenty thousand, six hundred two".