91443654 has 20 divisors (see below), whose sum is σ = 204901884. Its totient is φ = 30481164.

The previous prime is 91443619. The next prime is 91443679. The reversal of 91443654 is 45634419.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 282072 + ... + 282395.

Almost surely, 2^91443654 is an apocalyptic number.

91443654 is an abundant number, since it is smaller than the sum of its proper divisors (113458230).

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

91443654 is a wasteful number, since it uses less digits than its factorization.

91443654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564481 (or 564472 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 91443654 is about 9562.6175286895. The cubic root of 91443654 is about 450.5239231068.

The spelling of 91443654 in words is "ninety-one million, four hundred forty-three thousand, six hundred fifty-four".