91797646 has 16 divisors (see below), whose sum is σ = 145656864. Its totient is φ = 43300224.

The previous prime is 91797613. The next prime is 91797649. The reversal of 91797646 is 64679719.

It is a super-2 number, since 2×91797646² = 16853615622282632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91797646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91797649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10311 + ... + 17026.

It is an arithmetic number, because the mean of its divisors is an integer number (9103554).

Almost surely, 2^91797646 is an apocalyptic number.

91797646 is a deficient number, since it is larger than the sum of its proper divisors (53859218).

91797646 is a wasteful number, since it uses less digits than its factorization.

91797646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27435.

The product of its digits is 571536, while the sum is 49.

The square root of 91797646 is about 9581.1088084835. The cubic root of 91797646 is about 451.1045229494.

The spelling of 91797646 in words is "ninety-one million, seven hundred ninety-seven thousand, six hundred forty-six".