879025649 has 4 divisors (see below), whose sum is σ = 884925300. Its totient is φ = 873126000.

The previous prime is 879025621. The next prime is 879025657. The reversal of 879025649 is 946520978.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 122500624 + 756525025 = 11068^2 + 27505^2 .

It is a cyclic number.

It is not a de Polignac number, because 879025649 - 2²⁰ = 877977073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 879025597 and 879025606.

It is not an unprimeable number, because it can be changed into a prime (879025669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2949602 + ... + 2949899.

It is an arithmetic number, because the mean of its divisors is an integer number (221231325).

Almost surely, 2^879025649 is an apocalyptic number.

It is an amenable number.

879025649 is a deficient number, since it is larger than the sum of its proper divisors (5899651).

879025649 is a wasteful number, since it uses less digits than its factorization.

879025649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899650.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 879025649 is about 29648.3667172409. The cubic root of 879025649 is about 957.9301646843.

The spelling of 879025649 in words is "eight hundred seventy-nine million, twenty-five thousand, six hundred forty-nine".