91839955 has 8 divisors (see below), whose sum is σ = 114008400. Its totient is φ = 70938336.

The previous prime is 91839907. The next prime is 91839973. The reversal of 91839955 is 55993819.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91839955 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91839899 and 91839908.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316545 + ... + 316834.

It is an arithmetic number, because the mean of its divisors is an integer number (14251050).

Almost surely, 2^91839955 is an apocalyptic number.

91839955 is a deficient number, since it is larger than the sum of its proper divisors (22168445).

91839955 is a wasteful number, since it uses less digits than its factorization.

91839955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633413.

The product of its digits is 437400, while the sum is 49.

The square root of 91839955 is about 9583.3164927388. The cubic root of 91839955 is about 451.1738161200.

The spelling of 91839955 in words is "ninety-one million, eight hundred thirty-nine thousand, nine hundred fifty-five".