91763378 has 12 divisors (see below), whose sum is σ = 160117902. Its totient is φ = 39327120.

The previous prime is 91763351. The next prime is 91763381. The reversal of 91763378 is 87336719.

It can be written as a sum of positive squares in only one way, i.e., 60481729 + 31281649 = 7777^2 + 5593^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 468083 + ... + 468278.

Almost surely, 2^91763378 is an apocalyptic number.

91763378 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

91763378 is a deficient number, since it is larger than the sum of its proper divisors (68354524).

91763378 is a wasteful number, since it uses less digits than its factorization.

91763378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936377 (or 936370 counting only the distinct ones).

The product of its digits is 190512, while the sum is 44.

The square root of 91763378 is about 9579.3203307959. The cubic root of 91763378 is about 451.0483836241.

The spelling of 91763378 in words is "ninety-one million, seven hundred sixty-three thousand, three hundred seventy-eight".