64619013 has 4 divisors (see below), whose sum is σ = 86158688. Its totient is φ = 43079340.

The previous prime is 64619011. The next prime is 64619053. The reversal of 64619013 is 31091646.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64619013 - 2¹ = 64619011 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 (64619011) 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, 10769833 + ... + 10769838.

It is an arithmetic number, because the mean of its divisors is an integer number (21539672).

Almost surely, 2^64619013 is an apocalyptic number.

It is an amenable number.

64619013 is a deficient number, since it is larger than the sum of its proper divisors (21539675).

64619013 is a wasteful number, since it uses less digits than its factorization.

64619013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21539674.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 64619013 is about 8038.5952130954. The cubic root of 64619013 is about 401.2854748771.

The spelling of 64619013 in words is "sixty-four million, six hundred nineteen thousand, thirteen".