91870223 has 8 divisors (see below), whose sum is σ = 94938288. Its totient is φ = 88833024.

The previous prime is 91870213. The next prime is 91870279. The reversal of 91870223 is 32207819.

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

It is a cyclic number.

It is not a de Polignac number, because 91870223 - 2¹⁸ = 91608079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91870223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91870213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586 + ... + 13647.

It is an arithmetic number, because the mean of its divisors is an integer number (11867286).

Almost surely, 2^91870223 is an apocalyptic number.

91870223 is a deficient number, since it is larger than the sum of its proper divisors (3068065).

91870223 is a wasteful number, since it uses less digits than its factorization.

91870223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15433.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 91870223 is about 9584.8955654196. The cubic root of 91870223 is about 451.2233756285.

The spelling of 91870223 in words is "ninety-one million, eight hundred seventy thousand, two hundred twenty-three".