91820102 has 8 divisors (see below), whose sum is σ = 150251112. Its totient is φ = 41736400.

The previous prime is 91820087. The next prime is 91820123. The reversal of 91820102 is 20102819.

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

It is a super-2 number, since 2×91820102² = 16861862262580808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2086799 + ... + 2086842.

It is an arithmetic number, because the mean of its divisors is an integer number (18781389).

Almost surely, 2^91820102 is an apocalyptic number.

91820102 is a deficient number, since it is larger than the sum of its proper divisors (58431010).

91820102 is a wasteful number, since it uses less digits than its factorization.

91820102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4173654.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 91820102 is about 9582.2806262392. The cubic root of 91820102 is about 451.1413037664.

The spelling of 91820102 in words is "ninety-one million, eight hundred twenty thousand, one hundred two".