872643455 has 4 divisors (see below), whose sum is σ = 1047172152. Its totient is φ = 698114760.

The previous prime is 872643451. The next prime is 872643469. The reversal of 872643455 is 554346278.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 872643455 - 2² = 872643451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872643451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87264341 + ... + 87264350.

It is an arithmetic number, because the mean of its divisors is an integer number (261793038).

Almost surely, 2^872643455 is an apocalyptic number.

872643455 is a deficient number, since it is larger than the sum of its proper divisors (174528697).

872643455 is a wasteful number, since it uses less digits than its factorization.

872643455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174528696.

The product of its digits is 806400, while the sum is 44.

The square root of 872643455 is about 29540.5391792364. The cubic root of 872643455 is about 955.6061701727.

The spelling of 872643455 in words is "eight hundred seventy-two million, six hundred forty-three thousand, four hundred fifty-five".