647120488939 has 2 divisors, whose sum is σ = 647120488940. Its totient is φ = 647120488938.

The previous prime is 647120488813. The next prime is 647120488981. The reversal of 647120488939 is 939884021746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 647120488939 - 2²³ = 647112100331 is a prime.

It is not a weakly prime, because it can be changed into another prime (647120488439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323560244469 + 323560244470.

It is an arithmetic number, because the mean of its divisors is an integer number (323560244470).

Almost surely, 2^647120488939 is an apocalyptic number.

647120488939 is a deficient number, since it is larger than the sum of its proper divisors (1).

647120488939 is an equidigital number, since it uses as much as digits as its factorization.

647120488939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 61.

The spelling of 647120488939 in words is "six hundred forty-seven billion, one hundred twenty million, four hundred eighty-eight thousand, nine hundred thirty-nine".