264878969 has 2 divisors, whose sum is σ = 264878970. Its totient is φ = 264878968.

The previous prime is 264878963. The next prime is 264878993. The reversal of 264878969 is 969878462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254562025 + 10316944 = 15955^2 + 3212^2 .

It is a cyclic number.

It is not a de Polignac number, because 264878969 - 2¹² = 264874873 is a prime.

It is a super-2 number, since 2×264878969² = 140321736437005922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (264878963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132439484 + 132439485.

It is an arithmetic number, because the mean of its divisors is an integer number (132439485).

Almost surely, 2^264878969 is an apocalyptic number.

It is an amenable number.

264878969 is a deficient number, since it is larger than the sum of its proper divisors (1).

264878969 is an equidigital number, since it uses as much as digits as its factorization.

264878969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 59.

The square root of 264878969 is about 16275.1027339307. The cubic root of 264878969 is about 642.2180276421.

The spelling of 264878969 in words is "two hundred sixty-four million, eight hundred seventy-eight thousand, nine hundred sixty-nine".