64893719 has 4 divisors (see below), whose sum is σ = 70793160. Its totient is φ = 58994280.

The previous prime is 64893713. The next prime is 64893761. The reversal of 64893719 is 91739846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64893719 - 2²⁴ = 48116503 is a prime.

It is a super-2 number, since 2×64893719² = 8422389531301922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64893713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2949704 + ... + 2949725.

It is an arithmetic number, because the mean of its divisors is an integer number (17698290).

Almost surely, 2^64893719 is an apocalyptic number.

64893719 is a deficient number, since it is larger than the sum of its proper divisors (5899441).

64893719 is a wasteful number, since it uses less digits than its factorization.

64893719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5899440.

The product of its digits is 326592, while the sum is 47.

The square root of 64893719 is about 8055.6637839473. The cubic root of 64893719 is about 401.8533143859.

The spelling of 64893719 in words is "sixty-four million, eight hundred ninety-three thousand, seven hundred nineteen".