118223639 has 2 divisors, whose sum is σ = 118223640. Its totient is φ = 118223638.

The previous prime is 118223629. The next prime is 118223653. The reversal of 118223639 is 936322811.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118223639 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 118223599 and 118223608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118223629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59111819 + 59111820.

It is an arithmetic number, because the mean of its divisors is an integer number (59111820).

Almost surely, 2^118223639 is an apocalyptic number.

118223639 is a deficient number, since it is larger than the sum of its proper divisors (1).

118223639 is an equidigital number, since it uses as much as digits as its factorization.

118223639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 35.

The square root of 118223639 is about 10873.0694378358. The cubic root of 118223639 is about 490.7964819533.

The spelling of 118223639 in words is "one hundred eighteen million, two hundred twenty-three thousand, six hundred thirty-nine".