91434457 has 4 divisors (see below), whose sum is σ = 91466496. Its totient is φ = 91402420.

The previous prime is 91434451. The next prime is 91434493. The reversal of 91434457 is 75443419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91434457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91434451) 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, 11269 + ... + 17602.

It is an arithmetic number, because the mean of its divisors is an integer number (22866624).

Almost surely, 2^91434457 is an apocalyptic number.

It is an amenable number.

91434457 is a deficient number, since it is larger than the sum of its proper divisors (32039).

91434457 is a wasteful number, since it uses less digits than its factorization.

91434457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32038.

The product of its digits is 60480, while the sum is 37.

The square root of 91434457 is about 9562.1366336191. The cubic root of 91434457 is about 450.5088186964.

The spelling of 91434457 in words is "ninety-one million, four hundred thirty-four thousand, four hundred fifty-seven".