91089748 has 12 divisors (see below), whose sum is σ = 159551392. Its totient is φ = 45503640.

The previous prime is 91089727. The next prime is 91089773. The reversal of 91089748 is 84798019.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 91089698 and 91089707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5040 + ... + 14407.

Almost surely, 2^91089748 is an apocalyptic number.

It is an amenable number.

91089748 is a deficient number, since it is larger than the sum of its proper divisors (68461644).

91089748 is a wasteful number, since it uses less digits than its factorization.

91089748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20622 (or 20620 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 91089748 is about 9544.0949282790. The cubic root of 91089748 is about 449.9419645321.

The spelling of 91089748 in words is "ninety-one million, eighty-nine thousand, seven hundred forty-eight".