64670329 has 4 divisors (see below), whose sum is σ = 68474484. Its totient is φ = 60866176.

The previous prime is 64670327. The next prime is 64670351. The reversal of 64670329 is 92307646.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 45765225 = 4348^2 + 6765^2 .

It is a cyclic number.

It is not a de Polignac number, because 64670329 - 2¹ = 64670327 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64670327) 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, 1902052 + ... + 1902085.

It is an arithmetic number, because the mean of its divisors is an integer number (17118621).

Almost surely, 2^64670329 is an apocalyptic number.

It is an amenable number.

64670329 is a deficient number, since it is larger than the sum of its proper divisors (3804155).

64670329 is a wasteful number, since it uses less digits than its factorization.

64670329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3804154.

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

The square root of 64670329 is about 8041.7864308871. The cubic root of 64670329 is about 401.3916712625.

The spelling of 64670329 in words is "sixty-four million, six hundred seventy thousand, three hundred twenty-nine".