64479719 has 2 divisors, whose sum is σ = 64479720. Its totient is φ = 64479718.

The previous prime is 64479707. The next prime is 64479763. The reversal of 64479719 is 91797446.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64479719 is a prime.

It is a super-2 number, since 2×64479719² = 8315268324637922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64479799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32239859 + 32239860.

It is an arithmetic number, because the mean of its divisors is an integer number (32239860).

Almost surely, 2^64479719 is an apocalyptic number.

64479719 is a deficient number, since it is larger than the sum of its proper divisors (1).

64479719 is an equidigital number, since it uses as much as digits as its factorization.

64479719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 64479719 is about 8029.9264629260. The cubic root of 64479719 is about 400.9969278563.

The spelling of 64479719 in words is "sixty-four million, four hundred seventy-nine thousand, seven hundred nineteen".