91368945 has 16 divisors (see below), whose sum is σ = 162433920. Its totient is φ = 48730032.

The previous prime is 91368919. The next prime is 91368989. The reversal of 91368945 is 54986319.

It is a happy number.

It is not a de Polignac number, because 91368945 - 2⁶ = 91368881 is a prime.

It is a super-2 number, since 2×91368945² = 16696568220826050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91368945.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338269 + ... + 338538.

It is an arithmetic number, because the mean of its divisors is an integer number (10152120).

Almost surely, 2^91368945 is an apocalyptic number.

It is an amenable number.

91368945 is a deficient number, since it is larger than the sum of its proper divisors (71064975).

91368945 is a wasteful number, since it uses less digits than its factorization.

91368945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676821 (or 676815 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 91368945 is about 9558.7104255752. The cubic root of 91368945 is about 450.4011977612.

It can be divided in two parts, 9136 and 8945, that added together give a palindrome (18081).

The spelling of 91368945 in words is "ninety-one million, three hundred sixty-eight thousand, nine hundred forty-five".