64856269 has 2 divisors, whose sum is σ = 64856270. Its totient is φ = 64856268.

The previous prime is 64856243. The next prime is 64856321. The reversal of 64856269 is 96265846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62173225 + 2683044 = 7885^2 + 1638^2 .

It is a cyclic number.

It is not a de Polignac number, because 64856269 - 2²¹ = 62759117 is a prime.

It is a super-2 number, since 2×64856269² = 8412671257200722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64856369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32428134 + 32428135.

It is an arithmetic number, because the mean of its divisors is an integer number (32428135).

Almost surely, 2^64856269 is an apocalyptic number.

It is an amenable number.

64856269 is a deficient number, since it is larger than the sum of its proper divisors (1).

64856269 is an equidigital number, since it uses as much as digits as its factorization.

64856269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 622080, while the sum is 46.

The square root of 64856269 is about 8053.3389969627. The cubic root of 64856269 is about 401.7759966692.

The spelling of 64856269 in words is "sixty-four million, eight hundred fifty-six thousand, two hundred sixty-nine".