64493713 has 4 divisors (see below), whose sum is σ = 64572340. Its totient is φ = 64415088.

The previous prime is 64493687. The next prime is 64493717. The reversal of 64493713 is 31739446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31739446 = 2 ⋅15869723.

It can be written as a sum of positive squares in 2 ways, for example, as 44315649 + 20178064 = 6657^2 + 4492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64493713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64493717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38070 + ... + 39727.

It is an arithmetic number, because the mean of its divisors is an integer number (16143085).

Almost surely, 2^64493713 is an apocalyptic number.

It is an amenable number.

64493713 is a deficient number, since it is larger than the sum of its proper divisors (78627).

64493713 is an equidigital number, since it uses as much as digits as its factorization.

64493713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78626.

The product of its digits is 54432, while the sum is 37.

The square root of 64493713 is about 8030.7977810427. The cubic root of 64493713 is about 401.0259351430.

The spelling of 64493713 in words is "sixty-four million, four hundred ninety-three thousand, seven hundred thirteen".