118081493 has 2 divisors, whose sum is σ = 118081494. Its totient is φ = 118081492.

The previous prime is 118081489. The next prime is 118081519. The reversal of 118081493 is 394180811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116488849 + 1592644 = 10793^2 + 1262^2 .

It is a cyclic number.

It is not a de Polignac number, because 118081493 - 2² = 118081489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118081433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59040746 + 59040747.

It is an arithmetic number, because the mean of its divisors is an integer number (59040747).

Almost surely, 2^118081493 is an apocalyptic number.

It is an amenable number.

118081493 is a deficient number, since it is larger than the sum of its proper divisors (1).

118081493 is an equidigital number, since it uses as much as digits as its factorization.

118081493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 118081493 is about 10866.5308631596. The cubic root of 118081493 is about 490.5997002817.

The spelling of 118081493 in words is "one hundred eighteen million, eighty-one thousand, four hundred ninety-three".