118408261 has 2 divisors, whose sum is σ = 118408262. Its totient is φ = 118408260.

The previous prime is 118408237. The next prime is 118408267. The reversal of 118408261 is 162804811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118396161 + 12100 = 10881^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 118408261 - 2¹⁵ = 118375493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118408267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59204130 + 59204131.

It is an arithmetic number, because the mean of its divisors is an integer number (59204131).

Almost surely, 2^118408261 is an apocalyptic number.

It is an amenable number.

118408261 is a deficient number, since it is larger than the sum of its proper divisors (1).

118408261 is an equidigital number, since it uses as much as digits as its factorization.

118408261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 118408261 is about 10881.5560008668. The cubic root of 118408261 is about 491.0518304951.

The spelling of 118408261 in words is "one hundred eighteen million, four hundred eight thousand, two hundred sixty-one".