91941768 has 24 divisors (see below), whose sum is σ = 249009150. Its totient is φ = 30647232.

The previous prime is 91941767. The next prime is 91941793. The reversal of 91941768 is 86714919.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86825124 + 5116644 = 9318^2 + 2262^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (91941767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 638413 + ... + 638556.

Almost surely, 2^91941768 is an apocalyptic number.

It is an amenable number.

91941768 is an abundant number, since it is smaller than the sum of its proper divisors (157067382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91941768 is a wasteful number, since it uses less digits than its factorization.

91941768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276981 (or 1276974 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 91941768 is about 9588.6270132903. The cubic root of 91941768 is about 451.3404770454.

The spelling of 91941768 in words is "ninety-one million, nine hundred forty-one thousand, seven hundred sixty-eight".