118820389 has 2 divisors, whose sum is σ = 118820390. Its totient is φ = 118820388.

The previous prime is 118820381. The next prime is 118820399. The reversal of 118820389 is 983028811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108368100 + 10452289 = 10410^2 + 3233^2 .

It is a cyclic number.

It is not a de Polignac number, because 118820389 - 2³ = 118820381 is a prime.

It is a super-2 number, since 2×118820389² = 28236569684222642, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118820381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59410194 + 59410195.

It is an arithmetic number, because the mean of its divisors is an integer number (59410195).

Almost surely, 2^118820389 is an apocalyptic number.

It is an amenable number.

118820389 is a deficient number, since it is larger than the sum of its proper divisors (1).

118820389 is an equidigital number, since it uses as much as digits as its factorization.

118820389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 118820389 is about 10900.4765492156. The cubic root of 118820389 is about 491.6208838853.

The spelling of 118820389 in words is "one hundred eighteen million, eight hundred twenty thousand, three hundred eighty-nine".