64693229 has 4 divisors (see below), whose sum is σ = 66924060. Its totient is φ = 62462400.

The previous prime is 64693217. The next prime is 64693243. The reversal of 64693229 is 92239646.

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 48972004 + 15721225 = 6998^2 + 3965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64693229 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 (64693259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1115372 + ... + 1115429.

It is an arithmetic number, because the mean of its divisors is an integer number (16731015).

Almost surely, 2^64693229 is an apocalyptic number.

It is an amenable number.

64693229 is a deficient number, since it is larger than the sum of its proper divisors (2230831).

64693229 is a wasteful number, since it uses less digits than its factorization.

64693229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2230830.

The product of its digits is 139968, while the sum is 41.

The square root of 64693229 is about 8043.2101178572. The cubic root of 64693229 is about 401.4390437576.

The spelling of 64693229 in words is "sixty-four million, six hundred ninety-three thousand, two hundred twenty-nine".