872749191 has 8 divisors (see below), whose sum is σ = 1214259840. Its totient is φ = 556535672.

The previous prime is 872749177. The next prime is 872749193. The reversal of 872749191 is 191947278.

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 872749191 - 2²³ = 864360583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 872749191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872749193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6324201 + ... + 6324338.

It is an arithmetic number, because the mean of its divisors is an integer number (151782480).

Almost surely, 2^872749191 is an apocalyptic number.

872749191 is a deficient number, since it is larger than the sum of its proper divisors (341510649).

872749191 is a wasteful number, since it uses less digits than its factorization.

872749191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12648565.

The product of its digits is 254016, while the sum is 48.

The square root of 872749191 is about 29542.3288012303. The cubic root of 872749191 is about 955.6447647413.

The spelling of 872749191 in words is "eight hundred seventy-two million, seven hundred forty-nine thousand, one hundred ninety-one".