245807117 has 2 divisors, whose sum is σ = 245807118. Its totient is φ = 245807116.

The previous prime is 245807087. The next prime is 245807119. The reversal of 245807117 is 711708542.

245807117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237344836 + 8462281 = 15406^2 + 2909^2 .

It is a cyclic number.

It is not a de Polignac number, because 245807117 - 2⁸ = 245806861 is a prime.

It is a super-2 number, since 2×245807117² = 120842277535703378, which contains 22 as substring.

Together with 245807119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245807119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122903558 + 122903559.

It is an arithmetic number, because the mean of its divisors is an integer number (122903559).

Almost surely, 2^245807117 is an apocalyptic number.

It is an amenable number.

245807117 is a deficient number, since it is larger than the sum of its proper divisors (1).

245807117 is an equidigital number, since it uses as much as digits as its factorization.

245807117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15680, while the sum is 35.

The square root of 245807117 is about 15678.2370501278. The cubic root of 245807117 is about 626.4188497207.

The spelling of 245807117 in words is "two hundred forty-five million, eight hundred seven thousand, one hundred seventeen".