91739374 has 4 divisors (see below), whose sum is σ = 137609064. Its totient is φ = 45869686.

The previous prime is 91739371. The next prime is 91739407. The reversal of 91739374 is 47393719.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×91739374² = 16832225483823752, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91739374.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91739371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22934842 + ... + 22934845.

It is an arithmetic number, because the mean of its divisors is an integer number (34402266).

Almost surely, 2^91739374 is an apocalyptic number.

91739374 is a deficient number, since it is larger than the sum of its proper divisors (45869690).

91739374 is a wasteful number, since it uses less digits than its factorization.

91739374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45869689.

The product of its digits is 142884, while the sum is 43.

The square root of 91739374 is about 9578.0673415883. The cubic root of 91739374 is about 451.0090509046.

The spelling of 91739374 in words is "ninety-one million, seven hundred thirty-nine thousand, three hundred seventy-four".