879249408489 has 21 divisors (see below), whose sum is σ = 1318309020903. Its totient is φ = 586149394032.

The previous prime is 879249408397. The next prime is 879249408529. The reversal of 879249408489 is 984804942978.

It is a happy number.

The square root of 879249408489 is 937683.

It is a perfect power (a square), and thus also a powerful number.

879249408489 is a `hidden beast` number, since 8 + 7 + 92 + 494 + 0 + 8 + 48 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14572594089 + 864676814400 = 120717^2 + 929880^2 .

It is not a de Polignac number, because 879249408489 - 2⁹ = 879249407977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (879249478489) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 25300077 + ... + 25334805.

It is an arithmetic number, because the mean of its divisors is an integer number (62776620043).

Almost surely, 2^879249408489 is an apocalyptic number.

879249408489 is the 937683-rd square number.

879249408489 is the 468842-nd centered octagonal number.

It is an amenable number.

879249408489 is a deficient number, since it is larger than the sum of its proper divisors (439059612414).

879249408489 is an frugal number, since it uses more digits than its factorization.

879249408489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69476 (or 34732 counting only the distinct ones).

The product of its (nonzero) digits is 334430208, while the sum is 72.

The spelling of 879249408489 in words is "eight hundred seventy-nine billion, two hundred forty-nine million, four hundred eight thousand, four hundred eighty-nine".