64815323 has 2 divisors, whose sum is σ = 64815324. Its totient is φ = 64815322.

The previous prime is 64815307. The next prime is 64815329. The reversal of 64815323 is 32351846.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64815323 - 2⁴ = 64815307 is a prime.

It is a super-3 number, since 3×64815323³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64815323.

It is not a weakly prime, because it can be changed into another prime (64815329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32407661 + 32407662.

It is an arithmetic number, because the mean of its divisors is an integer number (32407662).

Almost surely, 2^64815323 is an apocalyptic number.

64815323 is a deficient number, since it is larger than the sum of its proper divisors (1).

64815323 is an equidigital number, since it uses as much as digits as its factorization.

64815323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 64815323 is about 8050.7964202307. The cubic root of 64815323 is about 401.6914271872.

The spelling of 64815323 in words is "sixty-four million, eight hundred fifteen thousand, three hundred twenty-three".