654787669 has 2 divisors, whose sum is σ = 654787670. Its totient is φ = 654787668.

The previous prime is 654787663. The next prime is 654787711. The reversal of 654787669 is 966787456.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564632644 + 90155025 = 23762^2 + 9495^2 .

It is a cyclic number.

It is not a de Polignac number, because 654787669 - 2¹⁵ = 654754901 is a prime.

It is a super-2 number, since 2×654787669² = 857493782948907122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654787663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327393834 + 327393835.

It is an arithmetic number, because the mean of its divisors is an integer number (327393835).

Almost surely, 2^654787669 is an apocalyptic number.

It is an amenable number.

654787669 is a deficient number, since it is larger than the sum of its proper divisors (1).

654787669 is an equidigital number, since it uses as much as digits as its factorization.

654787669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 58.

The square root of 654787669 is about 25588.8192185572. The cubic root of 654787669 is about 868.3607079794.

The spelling of 654787669 in words is "six hundred fifty-four million, seven hundred eighty-seven thousand, six hundred sixty-nine".