117307261 has 2 divisors, whose sum is σ = 117307262. Its totient is φ = 117307260.

The previous prime is 117307247. The next prime is 117307271. The reversal of 117307261 is 162703711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108035236 + 9272025 = 10394^2 + 3045^2 .

It is a cyclic number.

It is not a de Polignac number, because 117307261 - 2⁷ = 117307133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117307231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58653630 + 58653631.

It is an arithmetic number, because the mean of its divisors is an integer number (58653631).

Almost surely, 2^117307261 is an apocalyptic number.

It is an amenable number.

117307261 is a deficient number, since it is larger than the sum of its proper divisors (1).

117307261 is an equidigital number, since it uses as much as digits as its factorization.

117307261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 117307261 is about 10830.8476584245. The cubic root of 117307261 is about 489.5251000668.

The spelling of 117307261 in words is "one hundred seventeen million, three hundred seven thousand, two hundred sixty-one".