91082621 has 8 divisors (see below), whose sum is σ = 106219200. Its totient is φ = 78070524.

The previous prime is 91082603. The next prime is 91082627. The reversal of 91082621 is 12628019.

It is not a de Polignac number, because 91082621 - 2²² = 86888317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91082627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132431 + ... + 133116.

It is an arithmetic number, because the mean of its divisors is an integer number (13277400).

Almost surely, 2^91082621 is an apocalyptic number.

It is an amenable number.

91082621 is a deficient number, since it is larger than the sum of its proper divisors (15136579).

91082621 is an equidigital number, since it uses as much as digits as its factorization.

91082621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265568 (or 265554 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 91082621 is about 9543.7215487461. The cubic root of 91082621 is about 449.9302295122.

The spelling of 91082621 in words is "ninety-one million, eighty-two thousand, six hundred twenty-one".