64418869 has 2 divisors, whose sum is σ = 64418870. Its totient is φ = 64418868.

The previous prime is 64418839. The next prime is 64418909. The reversal of 64418869 is 96881446.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61826769 + 2592100 = 7863^2 + 1610^2 .

It is a cyclic number.

It is not a de Polignac number, because 64418869 - 2⁹ = 64418357 is a prime.

It is a super-2 number, since 2×64418869² = 8299581366478322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64418839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32209434 + 32209435.

It is an arithmetic number, because the mean of its divisors is an integer number (32209435).

Almost surely, 2^64418869 is an apocalyptic number.

It is an amenable number.

64418869 is a deficient number, since it is larger than the sum of its proper divisors (1).

64418869 is an equidigital number, since it uses as much as digits as its factorization.

64418869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 46.

The square root of 64418869 is about 8026.1366173272. The cubic root of 64418869 is about 400.8707468743.

The spelling of 64418869 in words is "sixty-four million, four hundred eighteen thousand, eight hundred sixty-nine".