307990117 has 2 divisors, whose sum is σ = 307990118. Its totient is φ = 307990116.

The previous prime is 307990099. The next prime is 307990127. The reversal of 307990117 is 711099703.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220492801 + 87497316 = 14849^2 + 9354^2 .

It is an emirp because it is prime and its reverse (711099703) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-307990117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (307990127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153995058 + 153995059.

It is an arithmetic number, because the mean of its divisors is an integer number (153995059).

Almost surely, 2^307990117 is an apocalyptic number.

It is an amenable number.

307990117 is a deficient number, since it is larger than the sum of its proper divisors (1).

307990117 is an equidigital number, since it uses as much as digits as its factorization.

307990117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11907, while the sum is 37.

The square root of 307990117 is about 17549.6472044312. The cubic root of 307990117 is about 675.3241183241.

The spelling of 307990117 in words is "three hundred seven million, nine hundred ninety thousand, one hundred seventeen".