655237969 has 2 divisors, whose sum is σ = 655237970. Its totient is φ = 655237968.

The previous prime is 655237967. The next prime is 655238033. The reversal of 655237969 is 969732556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 633025600 + 22212369 = 25160^2 + 4713^2 .

It is a cyclic number.

It is not a de Polignac number, because 655237969 - 2¹ = 655237967 is a prime.

It is a super-2 number, since 2×655237969² = 858673592038489922, which contains 22 as substring.

Together with 655237967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (655237963) 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, 327618984 + 327618985.

It is an arithmetic number, because the mean of its divisors is an integer number (327618985).

Almost surely, 2^655237969 is an apocalyptic number.

It is an amenable number.

655237969 is a deficient number, since it is larger than the sum of its proper divisors (1).

655237969 is an equidigital number, since it uses as much as digits as its factorization.

655237969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3061800, while the sum is 52.

The square root of 655237969 is about 25597.6164710701. The cubic root of 655237969 is about 868.5597206994.

It can be divided in two parts, 6552 and 37969, that added together give a square (44521 = 211²).

The spelling of 655237969 in words is "six hundred fifty-five million, two hundred thirty-seven thousand, nine hundred sixty-nine".