618953939 has 2 divisors, whose sum is σ = 618953940. Its totient is φ = 618953938.

The previous prime is 618953903. The next prime is 618953953. The reversal of 618953939 is 939359816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 618953939 - 2¹² = 618949843 is a prime.

It is not a weakly prime, because it can be changed into another prime (618950939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309476969 + 309476970.

It is an arithmetic number, because the mean of its divisors is an integer number (309476970).

Almost surely, 2^618953939 is an apocalyptic number.

618953939 is a deficient number, since it is larger than the sum of its proper divisors (1).

618953939 is an equidigital number, since it uses as much as digits as its factorization.

618953939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 53.

The square root of 618953939 is about 24878.7849180783. The cubic root of 618953939 is about 852.2220702000. Note that the first 3 decimals are identical.

The spelling of 618953939 in words is "six hundred eighteen million, nine hundred fifty-three thousand, nine hundred thirty-nine".