91434618 has 36 divisors (see below), whose sum is σ = 217760634. Its totient is φ = 27706800.

The previous prime is 91434613. The next prime is 91434661. The reversal of 91434618 is 81643419.

91434618 is a `hidden beast` number, since 9 + 1 + 4 + 34 + 618 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90954369 + 480249 = 9537^2 + 693^2 .

It is not an unprimeable number, because it can be changed into a prime (91434611) 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, 18813 + ... + 23168.

Almost surely, 2^91434618 is an apocalyptic number.

91434618 is an abundant number, since it is smaller than the sum of its proper divisors (126326016).

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

91434618 is a wasteful number, since it uses less digits than its factorization.

91434618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42011 (or 41997 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 91434618 is about 9562.1450522359. The cubic root of 91434618 is about 450.5090831185.

The spelling of 91434618 in words is "ninety-one million, four hundred thirty-four thousand, six hundred eighteen".