91874613 has 16 divisors (see below), whose sum is σ = 132468480. Its totient is φ = 56418816.

The previous prime is 91874603. The next prime is 91874659. The reversal of 91874613 is 31647819.

It is not a de Polignac number, because 91874613 - 2⁴ = 91874597 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91874603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16768 + ... + 21561.

It is an arithmetic number, because the mean of its divisors is an integer number (8279280).

Almost surely, 2^91874613 is an apocalyptic number.

It is an amenable number.

91874613 is a deficient number, since it is larger than the sum of its proper divisors (40593867).

91874613 is a wasteful number, since it uses less digits than its factorization.

91874613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38396.

The product of its digits is 36288, while the sum is 39.

The square root of 91874613 is about 9585.1245688306. The cubic root of 91874613 is about 451.2305627199.

The spelling of 91874613 in words is "ninety-one million, eight hundred seventy-four thousand, six hundred thirteen".