64568849 has 2 divisors, whose sum is σ = 64568850. Its totient is φ = 64568848.

The previous prime is 64568831. The next prime is 64568851. The reversal of 64568849 is 94886546.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37736449 + 26832400 = 6143^2 + 5180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64568849 is a prime.

It is a super-2 number, since 2×64568849² = 8338272522369602, which contains 22 as substring.

Together with 64568851, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64568797 and 64568806.

It is not a weakly prime, because it can be changed into another prime (64568869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32284424 + 32284425.

It is an arithmetic number, because the mean of its divisors is an integer number (32284425).

Almost surely, 2^64568849 is an apocalyptic number.

It is an amenable number.

64568849 is a deficient number, since it is larger than the sum of its proper divisors (1).

64568849 is an equidigital number, since it uses as much as digits as its factorization.

64568849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1658880, while the sum is 50.

The square root of 64568849 is about 8035.4744103880. The cubic root of 64568849 is about 401.1816081518.

The spelling of 64568849 in words is "sixty-four million, five hundred sixty-eight thousand, eight hundred forty-nine".