118188457 has 2 divisors, whose sum is σ = 118188458. Its totient is φ = 118188456.

The previous prime is 118188443. The next prime is 118188479. The reversal of 118188457 is 754881811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104468841 + 13719616 = 10221^2 + 3704^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118188457 is a prime.

It is a super-2 number, since 2×118188457² = 27937022736081698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (118188157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59094228 + 59094229.

It is an arithmetic number, because the mean of its divisors is an integer number (59094229).

Almost surely, 2^118188457 is an apocalyptic number.

It is an amenable number.

118188457 is a deficient number, since it is larger than the sum of its proper divisors (1).

118188457 is an equidigital number, since it uses as much as digits as its factorization.

118188457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71680, while the sum is 43.

The square root of 118188457 is about 10871.4514670305. The cubic root of 118188457 is about 490.7477919871.

The spelling of 118188457 in words is "one hundred eighteen million, one hundred eighty-eight thousand, four hundred fifty-seven".