118087213 has 2 divisors, whose sum is σ = 118087214. Its totient is φ = 118087212.

The previous prime is 118087201. The next prime is 118087231. The reversal of 118087213 is 312780811.

It is a happy number.

Together with next prime (118087231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78623689 + 39463524 = 8867^2 + 6282^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118087213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118087283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59043606 + 59043607.

It is an arithmetic number, because the mean of its divisors is an integer number (59043607).

Almost surely, 2^118087213 is an apocalyptic number.

It is an amenable number.

118087213 is a deficient number, since it is larger than the sum of its proper divisors (1).

118087213 is an equidigital number, since it uses as much as digits as its factorization.

118087213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 118087213 is about 10866.7940534456. The cubic root of 118087213 is about 490.6076218871.

The spelling of 118087213 in words is "one hundred eighteen million, eighty-seven thousand, two hundred thirteen".