709490917 has 2 divisors, whose sum is σ = 709490918. Its totient is φ = 709490916.

The previous prime is 709490879. The next prime is 709490933. The reversal of 709490917 is 719094907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 708304996 + 1185921 = 26614^2 + 1089^2 .

It is a cyclic number.

It is not a de Polignac number, because 709490917 - 2¹¹ = 709488869 is a prime.

It is a super-2 number, since 2×709490917² = 1006754722611001778, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (709490987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 354745458 + 354745459.

It is an arithmetic number, because the mean of its divisors is an integer number (354745459).

Almost surely, 2^709490917 is an apocalyptic number.

It is an amenable number.

709490917 is a deficient number, since it is larger than the sum of its proper divisors (1).

709490917 is an equidigital number, since it uses as much as digits as its factorization.

709490917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 709490917 is about 26636.2707036852. The cubic root of 709490917 is about 891.8988692180.

The spelling of 709490917 in words is "seven hundred nine million, four hundred ninety thousand, nine hundred seventeen".