91678734 has 36 divisors (see below), whose sum is σ = 227280456. Its totient is φ = 26163216.

The previous prime is 91678733. The next prime is 91678771. The reversal of 91678734 is 43787619.

It is a self number, because there is not a number n which added to its sum of digits gives 91678734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91678733) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 107052 + ... + 107904.

It is an arithmetic number, because the mean of its divisors is an integer number (6313346).

Almost surely, 2^91678734 is an apocalyptic number.

91678734 is an abundant number, since it is smaller than the sum of its proper divisors (135601722).

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

91678734 is an equidigital number, since it uses as much as digits as its factorization.

91678734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 865 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 91678734 is about 9574.9012527545. The cubic root of 91678734 is about 450.9096562251.

The spelling of 91678734 in words is "ninety-one million, six hundred seventy-eight thousand, seven hundred thirty-four".