654938939 has 2 divisors, whose sum is σ = 654938940. Its totient is φ = 654938938.

The previous prime is 654938863. The next prime is 654938941. The reversal of 654938939 is 939839456.

654938939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654938939 is a prime.

Together with 654938941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (654938969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327469469 + 327469470.

It is an arithmetic number, because the mean of its divisors is an integer number (327469470).

Almost surely, 2^654938939 is an apocalyptic number.

654938939 is a deficient number, since it is larger than the sum of its proper divisors (1).

654938939 is an equidigital number, since it uses as much as digits as its factorization.

654938939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 56.

The square root of 654938939 is about 25591.7748309882. The cubic root of 654938939 is about 868.4275728153.

The spelling of 654938939 in words is "six hundred fifty-four million, nine hundred thirty-eight thousand, nine hundred thirty-nine".