118310861 has 2 divisors, whose sum is σ = 118310862. Its totient is φ = 118310860.

The previous prime is 118310833. The next prime is 118310879. The reversal of 118310861 is 168013811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95452900 + 22857961 = 9770^2 + 4781^2 .

It is a cyclic number.

It is not a de Polignac number, because 118310861 - 2²² = 114116557 is a prime.

It is a super-2 number, since 2×118310861² = 27994919661122642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118310821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59155430 + 59155431.

It is an arithmetic number, because the mean of its divisors is an integer number (59155431).

Almost surely, 2^118310861 is an apocalyptic number.

It is an amenable number.

118310861 is a deficient number, since it is larger than the sum of its proper divisors (1).

118310861 is an equidigital number, since it uses as much as digits as its factorization.

118310861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 118310861 is about 10877.0796172502. The cubic root of 118310861 is about 490.9171507915.

The spelling of 118310861 in words is "one hundred eighteen million, three hundred ten thousand, eight hundred sixty-one".