91434578 has 8 divisors (see below), whose sum is σ = 137397168. Its totient is φ = 45635524.

The previous prime is 91434557. The next prime is 91434583. The reversal of 91434578 is 87543419.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39476 + ... + 41727.

It is an arithmetic number, because the mean of its divisors is an integer number (17174646).

Almost surely, 2^91434578 is an apocalyptic number.

91434578 is a deficient number, since it is larger than the sum of its proper divisors (45962590).

91434578 is a wasteful number, since it uses less digits than its factorization.

91434578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81768.

The product of its digits is 120960, while the sum is 41.

The square root of 91434578 is about 9562.1429606548. The cubic root of 91434578 is about 450.5090174236.

The spelling of 91434578 in words is "ninety-one million, four hundred thirty-four thousand, five hundred seventy-eight".