873121979 has 2 divisors, whose sum is σ = 873121980. Its totient is φ = 873121978.

The previous prime is 873121973. The next prime is 873122011. The reversal of 873121979 is 979121378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 873121979 - 2⁸ = 873121723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (873121973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436560989 + 436560990.

It is an arithmetic number, because the mean of its divisors is an integer number (436560990).

Almost surely, 2^873121979 is an apocalyptic number.

873121979 is a deficient number, since it is larger than the sum of its proper divisors (1).

873121979 is an equidigital number, since it uses as much as digits as its factorization.

873121979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 47.

The square root of 873121979 is about 29548.6375151207. The cubic root of 873121979 is about 955.7808107718.

The spelling of 873121979 in words is "eight hundred seventy-three million, one hundred twenty-one thousand, nine hundred seventy-nine".