91818842 has 8 divisors (see below), whose sum is σ = 139148436. Its totient is φ = 45436032.

The previous prime is 91818827. The next prime is 91818851. The reversal of 91818842 is 24881819.

It can be written as a sum of positive squares in 2 ways, for example, as 90079081 + 1739761 = 9491^2 + 1319^2 .

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 91818842.

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, 236453 + ... + 236840.

Almost surely, 2^91818842 is an apocalyptic number.

91818842 is a deficient number, since it is larger than the sum of its proper divisors (47329594).

91818842 is a wasteful number, since it uses less digits than its factorization.

91818842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473392.

The product of its digits is 36864, while the sum is 41.

The square root of 91818842 is about 9582.2148796612. The cubic root of 91818842 is about 451.1392401636.

The spelling of 91818842 in words is "ninety-one million, eight hundred eighteen thousand, eight hundred forty-two".