91820363 has 4 divisors (see below), whose sum is σ = 91855608. Its totient is φ = 91785120.

The previous prime is 91820359. The next prime is 91820381. The reversal of 91820363 is 36302819.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91820363 - 2² = 91820359 is a prime.

It is a super-2 number, since 2×91820363² = 16861958122903538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91820263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13373 + ... + 19038.

It is an arithmetic number, because the mean of its divisors is an integer number (22963902).

Almost surely, 2^91820363 is an apocalyptic number.

91820363 is a deficient number, since it is larger than the sum of its proper divisors (35245).

91820363 is a wasteful number, since it uses less digits than its factorization.

91820363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35244.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 91820363 is about 9582.2942451169. The cubic root of 91820363 is about 451.1417312246.

The spelling of 91820363 in words is "ninety-one million, eight hundred twenty thousand, three hundred sixty-three".