64613953 has 4 divisors (see below), whose sum is σ = 64896340. Its totient is φ = 64331568.

The previous prime is 64613921. The next prime is 64613977. The reversal of 64613953 is 35931646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35931646 = 2 ⋅17965823.

It can be written as a sum of positive squares in 2 ways, for example, as 62995969 + 1617984 = 7937^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 64613953 - 2⁵ = 64613921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64613453) 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, 140850 + ... + 141307.

It is an arithmetic number, because the mean of its divisors is an integer number (16224085).

Almost surely, 2^64613953 is an apocalyptic number.

It is an amenable number.

64613953 is a deficient number, since it is larger than the sum of its proper divisors (282387).

64613953 is a wasteful number, since it uses less digits than its factorization.

64613953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282386.

The product of its digits is 58320, while the sum is 37.

The square root of 64613953 is about 8038.2804753256. The cubic root of 64613953 is about 401.2750003671.

The spelling of 64613953 in words is "sixty-four million, six hundred thirteen thousand, nine hundred fifty-three".