872415191 has 8 divisors (see below), whose sum is σ = 926916480. Its totient is φ = 818772408.

The previous prime is 872415161. The next prime is 872415211. The reversal of 872415191 is 191514278.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872415191 is a prime.

It is a super-2 number, since 2×872415191² = 1522216530975132962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872415161) 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, 212531 + ... + 216596.

It is an arithmetic number, because the mean of its divisors is an integer number (115864560).

Almost surely, 2^872415191 is an apocalyptic number.

872415191 is a deficient number, since it is larger than the sum of its proper divisors (54501289).

872415191 is a wasteful number, since it uses less digits than its factorization.

872415191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429253.

The product of its digits is 20160, while the sum is 38.

The square root of 872415191 is about 29536.6753545486. The cubic root of 872415191 is about 955.5228411766.

The spelling of 872415191 in words is "eight hundred seventy-two million, four hundred fifteen thousand, one hundred ninety-one".