64613149 has 4 divisors (see below), whose sum is σ = 64639836. Its totient is φ = 64586464.

The previous prime is 64613147. The next prime is 64613161. The reversal of 64613149 is 94131646.

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 8468100 + 56145049 = 2910^2 + 7493^2 .

It is a cyclic number.

It is not a de Polignac number, because 64613149 - 2¹ = 64613147 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 (64613147) 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, 9304 + ... + 14689.

It is an arithmetic number, because the mean of its divisors is an integer number (16159959).

Almost surely, 2^64613149 is an apocalyptic number.

It is an amenable number.

64613149 is a deficient number, since it is larger than the sum of its proper divisors (26687).

64613149 is a wasteful number, since it uses less digits than its factorization.

64613149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26686.

The product of its digits is 15552, while the sum is 34.

The square root of 64613149 is about 8038.2304644741. The cubic root of 64613149 is about 401.2733359875.

The spelling of 64613149 in words is "sixty-four million, six hundred thirteen thousand, one hundred forty-nine".