999077917 has 2 divisors, whose sum is σ = 999077918. Its totient is φ = 999077916.

The previous prime is 999077903. The next prime is 999077921. The reversal of 999077917 is 719770999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744962436 + 254115481 = 27294^2 + 15941^2 .

It is a cyclic number.

It is not a de Polignac number, because 999077917 - 2²⁷ = 864860189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999077957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499538958 + 499538959.

It is an arithmetic number, because the mean of its divisors is an integer number (499538959).

Almost surely, 2^999077917 is an apocalyptic number.

It is an amenable number.

999077917 is a deficient number, since it is larger than the sum of its proper divisors (1).

999077917 is an equidigital number, since it uses as much as digits as its factorization.

999077917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250423, while the sum is 58.

The square root of 999077917 is about 31608.1938269177. The cubic root of 999077917 is about 999.6925444808.

The spelling of 999077917 in words is "nine hundred ninety-nine million, seventy-seven thousand, nine hundred seventeen".