118440857 has 2 divisors, whose sum is σ = 118440858. Its totient is φ = 118440856.

The previous prime is 118440827. The next prime is 118440859. The reversal of 118440857 is 758044811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63027721 + 55413136 = 7939^2 + 7444^2 .

It is a cyclic number.

It is not a de Polignac number, because 118440857 - 2²² = 114246553 is a prime.

Together with 118440859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118440857.

It is not a weakly prime, because it can be changed into another prime (118440859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59220428 + 59220429.

It is an arithmetic number, because the mean of its divisors is an integer number (59220429).

Almost surely, 2^118440857 is an apocalyptic number.

It is an amenable number.

118440857 is a deficient number, since it is larger than the sum of its proper divisors (1).

118440857 is an equidigital number, since it uses as much as digits as its factorization.

118440857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 118440857 is about 10883.0536615419. The cubic root of 118440857 is about 491.0968860703.

The spelling of 118440857 in words is "one hundred eighteen million, four hundred forty thousand, eight hundred fifty-seven".