872928643 has 4 divisors (see below), whose sum is σ = 882736920. Its totient is φ = 863120368.

The previous prime is 872928611. The next prime is 872928649. The reversal of 872928643 is 346829278.

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

It is a cyclic number.

It is not a de Polignac number, because 872928643 - 2⁵ = 872928611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (872928649) 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, 4904005 + ... + 4904182.

It is an arithmetic number, because the mean of its divisors is an integer number (220684230).

Almost surely, 2^872928643 is an apocalyptic number.

872928643 is a deficient number, since it is larger than the sum of its proper divisors (9808277).

872928643 is an equidigital number, since it uses as much as digits as its factorization.

872928643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808276.

The product of its digits is 1161216, while the sum is 49.

The square root of 872928643 is about 29545.3658464403. The cubic root of 872928643 is about 955.7102591635.

The spelling of 872928643 in words is "eight hundred seventy-two million, nine hundred twenty-eight thousand, six hundred forty-three".