118180397 has 2 divisors, whose sum is σ = 118180398. Its totient is φ = 118180396.

The previous prime is 118180367. The next prime is 118180457. The reversal of 118180397 is 793081811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117202276 + 978121 = 10826^2 + 989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118180397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118180397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118180367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59090198 + 59090199.

It is an arithmetic number, because the mean of its divisors is an integer number (59090199).

Almost surely, 2^118180397 is an apocalyptic number.

It is an amenable number.

118180397 is a deficient number, since it is larger than the sum of its proper divisors (1).

118180397 is an equidigital number, since it uses as much as digits as its factorization.

118180397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 38.

The square root of 118180397 is about 10871.0807650390. The cubic root of 118180397 is about 490.7366360271.

The spelling of 118180397 in words is "one hundred eighteen million, one hundred eighty thousand, three hundred ninety-seven".