118217969 has 2 divisors, whose sum is σ = 118217970. Its totient is φ = 118217968.

The previous prime is 118217959. The next prime is 118217989. The reversal of 118217969 is 969712811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 169744 = 10865^2 + 412^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118217969 is a prime.

It is a super-2 number, since 2×118217969² = 27950976388969922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (118217959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59108984 + 59108985.

It is an arithmetic number, because the mean of its divisors is an integer number (59108985).

Almost surely, 2^118217969 is an apocalyptic number.

It is an amenable number.

118217969 is a deficient number, since it is larger than the sum of its proper divisors (1).

118217969 is an equidigital number, since it uses as much as digits as its factorization.

118217969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 44.

The square root of 118217969 is about 10872.8086987678. The cubic root of 118217969 is about 490.7886356360.

The spelling of 118217969 in words is "one hundred eighteen million, two hundred seventeen thousand, nine hundred sixty-nine".