654938969 has 2 divisors, whose sum is σ = 654938970. Its totient is φ = 654938968.

The previous prime is 654938941. The next prime is 654938971. The reversal of 654938969 is 969839456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529230025 + 125708944 = 23005^2 + 11212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-654938969 is a prime.

It is a super-2 number, since 2×654938969² = 857890106229565922, which contains 22 as substring.

Together with 654938971, 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 (654938939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327469484 + 327469485.

It is an arithmetic number, because the mean of its divisors is an integer number (327469485).

Almost surely, 2^654938969 is an apocalyptic number.

It is an amenable number.

654938969 is a deficient number, since it is larger than the sum of its proper divisors (1).

654938969 is an equidigital number, since it uses as much as digits as its factorization.

654938969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 59.

The square root of 654938969 is about 25591.7754171140. The cubic root of 654938969 is about 868.4275860750.

The spelling of 654938969 in words is "six hundred fifty-four million, nine hundred thirty-eight thousand, nine hundred sixty-nine".