118946813 has 2 divisors, whose sum is σ = 118946814. Its totient is φ = 118946812.

The previous prime is 118946761. The next prime is 118946831. The reversal of 118946813 is 318649811.

Together with next prime (118946831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115842169 + 3104644 = 10763^2 + 1762^2 .

It is an emirp because it is prime and its reverse (318649811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118946813 - 2²⁶ = 51837949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118946833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59473406 + 59473407.

It is an arithmetic number, because the mean of its divisors is an integer number (59473407).

Almost surely, 2^118946813 is an apocalyptic number.

It is an amenable number.

118946813 is a deficient number, since it is larger than the sum of its proper divisors (1).

118946813 is an equidigital number, since it uses as much as digits as its factorization.

118946813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 41.

The square root of 118946813 is about 10906.2740200309. The cubic root of 118946813 is about 491.7951823898.

The spelling of 118946813 in words is "one hundred eighteen million, nine hundred forty-six thousand, eight hundred thirteen".