879649 has 2 divisors, whose sum is σ = 879650. Its totient is φ = 879648.

The previous prime is 879629. The next prime is 879653. The reversal of 879649 is 946978.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 868624 + 11025 = 932^2 + 105^2 .

It is a cyclic number.

It is not a de Polignac number, because 879649 - 2⁵ = 879617 is a prime.

It is not a weakly prime, because it can be changed into another prime (879629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439824 + 439825.

It is an arithmetic number, because the mean of its divisors is an integer number (439825).

2⁸⁷⁹⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

879649 is a deficient number, since it is larger than the sum of its proper divisors (1).

879649 is an equidigital number, since it uses as much as digits as its factorization.

879649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 879649 is about 937.8960496771. The cubic root of 879649 is about 95.8156546259.

The spelling of 879649 in words is "eight hundred seventy-nine thousand, six hundred forty-nine".