64719613 has 8 divisors (see below), whose sum is σ = 74040128. Its totient is φ = 55417824.

The previous prime is 64719593. The next prime is 64719617. The reversal of 64719613 is 31691746.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64719613 - 2¹³ = 64711421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64719617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3745 + ... + 11977.

It is an arithmetic number, because the mean of its divisors is an integer number (9255016).

Almost surely, 2^64719613 is an apocalyptic number.

It is an amenable number.

64719613 is a deficient number, since it is larger than the sum of its proper divisors (9320515).

64719613 is a wasteful number, since it uses less digits than its factorization.

64719613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9363.

The product of its digits is 27216, while the sum is 37.

The square root of 64719613 is about 8044.8500918289. The cubic root of 64719613 is about 401.4936096339.

The spelling of 64719613 in words is "sixty-four million, seven hundred nineteen thousand, six hundred thirteen".