872663649 has 16 divisors (see below), whose sum is σ = 1366970304. Its totient is φ = 488203200.

The previous prime is 872663641. The next prime is 872663653. The reversal of 872663649 is 946366278.

It is a happy number.

It is not a de Polignac number, because 872663649 - 2³ = 872663641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (872663641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1016662 + ... + 1017519.

It is an arithmetic number, because the mean of its divisors is an integer number (85435644).

Almost surely, 2^872663649 is an apocalyptic number.

It is an amenable number.

872663649 is a deficient number, since it is larger than the sum of its proper divisors (494306655).

872663649 is a wasteful number, since it uses less digits than its factorization.

872663649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034208.

The product of its digits is 2612736, while the sum is 51.

The square root of 872663649 is about 29540.8809787386. The cubic root of 872663649 is about 955.6135414009.

The spelling of 872663649 in words is "eight hundred seventy-two million, six hundred sixty-three thousand, six hundred forty-nine".