917890677139 has 2 divisors, whose sum is σ = 917890677140. Its totient is φ = 917890677138.

The previous prime is 917890677083. The next prime is 917890677161. The reversal of 917890677139 is 931776098719.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 917890677139 - 2⁹ = 917890676627 is a prime.

It is not a weakly prime, because it can be changed into another prime (917890687139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458945338569 + 458945338570.

It is an arithmetic number, because the mean of its divisors is an integer number (458945338570).

Almost surely, 2^917890677139 is an apocalyptic number.

917890677139 is a deficient number, since it is larger than the sum of its proper divisors (1).

917890677139 is an equidigital number, since it uses as much as digits as its factorization.

917890677139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36006768, while the sum is 67.

The spelling of 917890677139 in words is "nine hundred seventeen billion, eight hundred ninety million, six hundred seventy-seven thousand, one hundred thirty-nine".