91434047 has 4 divisors (see below), whose sum is σ = 92591520. Its totient is φ = 90276576.

The previous prime is 91434017. The next prime is 91434073. The reversal of 91434047 is 74043419.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74043419 = 1231 ⋅60149.

It is a cyclic number.

It is not a de Polignac number, because 91434047 - 2⁶ = 91433983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91434017) 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, 578618 + ... + 578775.

It is an arithmetic number, because the mean of its divisors is an integer number (23147880).

Almost surely, 2^91434047 is an apocalyptic number.

91434047 is a deficient number, since it is larger than the sum of its proper divisors (1157473).

91434047 is a wasteful number, since it uses less digits than its factorization.

91434047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157472.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 91434047 is about 9562.1151948719. The cubic root of 91434047 is about 450.5081453219.

The spelling of 91434047 in words is "ninety-one million, four hundred thirty-four thousand, forty-seven".