654606839 has 2 divisors, whose sum is σ = 654606840. Its totient is φ = 654606838.

The previous prime is 654606833. The next prime is 654606857. The reversal of 654606839 is 938606456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654606839 is a prime.

It is a super-2 number, since 2×654606839² = 857020227331143842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 654606793 and 654606802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654606833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327303419 + 327303420.

It is an arithmetic number, because the mean of its divisors is an integer number (327303420).

Almost surely, 2^654606839 is an apocalyptic number.

654606839 is a deficient number, since it is larger than the sum of its proper divisors (1).

654606839 is an equidigital number, since it uses as much as digits as its factorization.

654606839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 654606839 is about 25585.2855954355. The cubic root of 654606839 is about 868.2807634256.

The spelling of 654606839 in words is "six hundred fifty-four million, six hundred six thousand, eight hundred thirty-nine".