118772881 has 2 divisors, whose sum is σ = 118772882. Its totient is φ = 118772880.

The previous prime is 118772879. The next prime is 118772909. The reversal of 118772881 is 188277811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114832656 + 3940225 = 10716^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 118772881 - 2¹ = 118772879 is a prime.

It is a super-2 number, since 2×118772881² = 28213994522080322, which contains 22 as substring.

Together with 118772879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (118772821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59386440 + 59386441.

It is an arithmetic number, because the mean of its divisors is an integer number (59386441).

Almost surely, 2^118772881 is an apocalyptic number.

It is an amenable number.

118772881 is a deficient number, since it is larger than the sum of its proper divisors (1).

118772881 is an equidigital number, since it uses as much as digits as its factorization.

118772881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176, while the sum is 43.

The square root of 118772881 is about 10898.2971605660. The cubic root of 118772881 is about 491.5553534977. Note that the first 3 decimals are identical.

The spelling of 118772881 in words is "one hundred eighteen million, seven hundred seventy-two thousand, eight hundred eighty-one".