91874642 has 8 divisors (see below), whose sum is σ = 137854332. Its totient is φ = 45923200.

The previous prime is 91874603. The next prime is 91874659. The reversal of 91874642 is 24647819.

It can be written as a sum of positive squares in 2 ways, for example, as 89889361 + 1985281 = 9481^2 + 1409^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 91874642.

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, 5642 + ... + 14682.

Almost surely, 2^91874642 is an apocalyptic number.

91874642 is a deficient number, since it is larger than the sum of its proper divisors (45979690).

91874642 is a wasteful number, since it uses less digits than its factorization.

91874642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14124.

The product of its digits is 96768, while the sum is 41.

The square root of 91874642 is about 9585.1260815912. The cubic root of 91874642 is about 451.2306101965.

The spelling of 91874642 in words is "ninety-one million, eight hundred seventy-four thousand, six hundred forty-two".