91437914 has 4 divisors (see below), whose sum is σ = 137156874. Its totient is φ = 45718956.

The previous prime is 91437881. The next prime is 91437959. The reversal of 91437914 is 41973419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41973419 = 239 ⋅175621.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 21464689 = 8365^2 + 4633^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22859477 + ... + 22859480.

Almost surely, 2^91437914 is an apocalyptic number.

91437914 is a deficient number, since it is larger than the sum of its proper divisors (45718960).

91437914 is a wasteful number, since it uses less digits than its factorization.

91437914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45718959.

The product of its digits is 27216, while the sum is 38.

The square root of 91437914 is about 9562.3173969493. The cubic root of 91437914 is about 450.5144963129.

The spelling of 91437914 in words is "ninety-one million, four hundred thirty-seven thousand, nine hundred fourteen".