64345819 has 2 divisors, whose sum is σ = 64345820. Its totient is φ = 64345818.

The previous prime is 64345807. The next prime is 64345847. The reversal of 64345819 is 91854346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64345819 - 2⁷ = 64345691 is a prime.

It is a super-2 number, since 2×64345819² = 8280768845561522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64345859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32172909 + 32172910.

It is an arithmetic number, because the mean of its divisors is an integer number (32172910).

Almost surely, 2^64345819 is an apocalyptic number.

64345819 is a deficient number, since it is larger than the sum of its proper divisors (1).

64345819 is an equidigital number, since it uses as much as digits as its factorization.

64345819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 40.

The square root of 64345819 is about 8021.5845691484. The cubic root of 64345819 is about 400.7191624884.

The spelling of 64345819 in words is "sixty-four million, three hundred forty-five thousand, eight hundred nineteen".