872949317 has 4 divisors (see below), whose sum is σ = 873010476. Its totient is φ = 872888160.

The previous prime is 872949299. The next prime is 872949347. The reversal of 872949317 is 713949278.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 48455521 + 824493796 = 6961^2 + 28714^2 .

It is a cyclic number.

It is not a de Polignac number, because 872949317 - 2¹⁴ = 872932933 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 (872949347) 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, 3467 + ... + 41927.

It is an arithmetic number, because the mean of its divisors is an integer number (218252619).

Almost surely, 2^872949317 is an apocalyptic number.

It is an amenable number.

872949317 is a deficient number, since it is larger than the sum of its proper divisors (61159).

872949317 is a wasteful number, since it uses less digits than its factorization.

872949317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61158.

The product of its digits is 762048, while the sum is 50.

The square root of 872949317 is about 29545.7157131114. The cubic root of 872949317 is about 955.7178039565.

The spelling of 872949317 in words is "eight hundred seventy-two million, nine hundred forty-nine thousand, three hundred seventeen".