118211969 has 2 divisors, whose sum is σ = 118211970. Its totient is φ = 118211968.

The previous prime is 118211953. The next prime is 118212007. The reversal of 118211969 is 969112811.

It is an a-pointer prime, because the next prime (118212007) can be obtained adding 118211969 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114211969 + 4000000 = 10687^2 + 2000^2 .

It is an emirp because it is prime and its reverse (969112811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 118211969 - 2⁴ = 118211953 is a prime.

It is a super-2 number, since 2×118211969² = 27948139229713922, which contains 22 as substring.

It is a Chen prime.

It is equal to p_6745673 and since 118211969 and 6745673 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (118211069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59105984 + 59105985.

It is an arithmetic number, because the mean of its divisors is an integer number (59105985).

Almost surely, 2^118211969 is an apocalyptic number.

It is an amenable number.

118211969 is a deficient number, since it is larger than the sum of its proper divisors (1).

118211969 is an equidigital number, since it uses as much as digits as its factorization.

118211969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 38.

The square root of 118211969 is about 10872.5327776006. The cubic root of 118211969 is about 490.7803323816.

The spelling of 118211969 in words is "one hundred eighteen million, two hundred eleven thousand, nine hundred sixty-nine".