91689048 has 48 divisors (see below), whose sum is σ = 270901800. Its totient is φ = 27784320.

The previous prime is 91689043. The next prime is 91689053. The reversal of 91689048 is 84098619.

It is an interprime number because it is at equal distance from previous prime (91689043) and next prime (91689053).

It is a junction number, because it is equal to n+sod(n) for n = 91688994 and 91689012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91689043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57093 + ... + 58676.

Almost surely, 2^91689048 is an apocalyptic number.

It is an amenable number.

91689048 is an abundant number, since it is smaller than the sum of its proper divisors (179212752).

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

91689048 is a wasteful number, since it uses less digits than its factorization.

91689048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115792 (or 115785 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 91689048 is about 9575.4398332400. The cubic root of 91689048 is about 450.9265649367.

The spelling of 91689048 in words is "ninety-one million, six hundred eighty-nine thousand, forty-eight".