91645953 has 8 divisors (see below), whose sum is σ = 139651008. Its totient is φ = 52369104.

The previous prime is 91645937. The next prime is 91645979. The reversal of 91645953 is 35954619.

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

It is not a de Polignac number, because 91645953 - 2⁴ = 91645937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91645903) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2182026 + ... + 2182067.

It is an arithmetic number, because the mean of its divisors is an integer number (17456376).

Almost surely, 2^91645953 is an apocalyptic number.

It is an amenable number.

91645953 is a deficient number, since it is larger than the sum of its proper divisors (48005055).

91645953 is a wasteful number, since it uses less digits than its factorization.

91645953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4364103.

The product of its digits is 145800, while the sum is 42.

The square root of 91645953 is about 9573.1892804854. The cubic root of 91645953 is about 450.8559068226.

The spelling of 91645953 in words is "ninety-one million, six hundred forty-five thousand, nine hundred fifty-three".