64836869 has 2 divisors, whose sum is σ = 64836870. Its totient is φ = 64836868.

The previous prime is 64836859. The next prime is 64836883. The reversal of 64836869 is 96863846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53479969 + 11356900 = 7313^2 + 3370^2 .

It is a cyclic number.

It is not a de Polignac number, because 64836869 - 2¹² = 64832773 is a prime.

It is a super-2 number, since 2×64836869² = 8407639163446322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64836809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32418434 + 32418435.

It is an arithmetic number, because the mean of its divisors is an integer number (32418435).

Almost surely, 2^64836869 is an apocalyptic number.

It is an amenable number.

64836869 is a deficient number, since it is larger than the sum of its proper divisors (1).

64836869 is an equidigital number, since it uses as much as digits as its factorization.

64836869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 50.

The square root of 64836869 is about 8052.1344375265. The cubic root of 64836869 is about 401.7359325307.

The spelling of 64836869 in words is "sixty-four million, eight hundred thirty-six thousand, eight hundred sixty-nine".