872948639 has 2 divisors, whose sum is σ = 872948640. Its totient is φ = 872948638.

The previous prime is 872948591. The next prime is 872948653. The reversal of 872948639 is 936849278.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-872948639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872948669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436474319 + 436474320.

It is an arithmetic number, because the mean of its divisors is an integer number (436474320).

Almost surely, 2^872948639 is an apocalyptic number.

872948639 is a deficient number, since it is larger than the sum of its proper divisors (1).

872948639 is an equidigital number, since it uses as much as digits as its factorization.

872948639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 56.

The square root of 872948639 is about 29545.7042393645. The cubic root of 872948639 is about 955.7175565283.

The spelling of 872948639 in words is "eight hundred seventy-two million, nine hundred forty-eight thousand, six hundred thirty-nine".