879149389 has 2 divisors, whose sum is σ = 879149390. Its totient is φ = 879149388.

The previous prime is 879149377. The next prime is 879149431. The reversal of 879149389 is 983941978.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871253289 + 7896100 = 29517^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 879149389 - 2⁵ = 879149357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (879149189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439574694 + 439574695.

It is an arithmetic number, because the mean of its divisors is an integer number (439574695).

Almost surely, 2^879149389 is an apocalyptic number.

It is an amenable number.

879149389 is a deficient number, since it is larger than the sum of its proper divisors (1).

879149389 is an equidigital number, since it uses as much as digits as its factorization.

879149389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 58.

The square root of 879149389 is about 29650.4534366677. The cubic root of 879149389 is about 957.9751116917.

The spelling of 879149389 in words is "eight hundred seventy-nine million, one hundred forty-nine thousand, three hundred eighty-nine".