879944987 has 2 divisors, whose sum is σ = 879944988. Its totient is φ = 879944986.

The previous prime is 879944981. The next prime is 879945019. The reversal of 879944987 is 789449978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 879944987 - 2⁸ = 879944731 is a prime.

It is not a weakly prime, because it can be changed into another prime (879944981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 439972493 + 439972494.

It is an arithmetic number, because the mean of its divisors is an integer number (439972494).

Almost surely, 2^879944987 is an apocalyptic number.

879944987 is a deficient number, since it is larger than the sum of its proper divisors (1).

879944987 is an equidigital number, since it uses as much as digits as its factorization.

879944987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 65.

The square root of 879944987 is about 29663.8666899647. The cubic root of 879944987 is about 958.2640020282.

The spelling of 879944987 in words is "eight hundred seventy-nine million, nine hundred forty-four thousand, nine hundred eighty-seven".