654868969 has 2 divisors, whose sum is σ = 654868970. Its totient is φ = 654868968.

The previous prime is 654868967. The next prime is 654868979. The reversal of 654868969 is 969868456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430977600 + 223891369 = 20760^2 + 14963^2 .

It is a cyclic number.

It is not a de Polignac number, because 654868969 - 2¹ = 654868967 is a prime.

It is a super-2 number, since 2×654868969² = 857706733118245922, which contains 22 as substring.

Together with 654868967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (654868967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327434484 + 327434485.

It is an arithmetic number, because the mean of its divisors is an integer number (327434485).

Almost surely, 2^654868969 is an apocalyptic number.

It is an amenable number.

654868969 is a deficient number, since it is larger than the sum of its proper divisors (1).

654868969 is an equidigital number, since it uses as much as digits as its factorization.

654868969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 61.

The square root of 654868969 is about 25590.4077536877. The cubic root of 654868969 is about 868.3966457382.

The spelling of 654868969 in words is "six hundred fifty-four million, eight hundred sixty-eight thousand, nine hundred sixty-nine".