91989674 has 8 divisors (see below), whose sum is σ = 157696608. Its totient is φ = 39424140.

The previous prime is 91989671. The next prime is 91989731. The reversal of 91989674 is 47698919.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (91989671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3285332 + ... + 3285359.

It is an arithmetic number, because the mean of its divisors is an integer number (19712076).

Almost surely, 2^91989674 is an apocalyptic number.

91989674 is a deficient number, since it is larger than the sum of its proper divisors (65706934).

91989674 is a wasteful number, since it uses less digits than its factorization.

91989674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6570700.

The product of its digits is 979776, while the sum is 53.

The square root of 91989674 is about 9591.1247515607. The cubic root of 91989674 is about 451.4188533304.

The spelling of 91989674 in words is "ninety-one million, nine hundred eighty-nine thousand, six hundred seventy-four".