306697117 has 2 divisors, whose sum is σ = 306697118. Its totient is φ = 306697116.

The previous prime is 306697099. The next prime is 306697121. The reversal of 306697117 is 711796603.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251254201 + 55442916 = 15851^2 + 7446^2 .

It is a cyclic number.

It is not a de Polignac number, because 306697117 - 2¹⁹ = 306172829 is a prime.

It is a super-2 number, since 2×306697117² = 188126243152223378, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 306697117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (306697217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153348558 + 153348559.

It is an arithmetic number, because the mean of its divisors is an integer number (153348559).

Almost surely, 2^306697117 is an apocalyptic number.

It is an amenable number.

306697117 is a deficient number, since it is larger than the sum of its proper divisors (1).

306697117 is an equidigital number, since it uses as much as digits as its factorization.

306697117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 306697117 is about 17512.7701121210. The cubic root of 306697117 is about 674.3777471706.

The spelling of 306697117 in words is "three hundred six million, six hundred ninety-seven thousand, one hundred seventeen".