64606273 has 4 divisors (see below), whose sum is σ = 68406660. Its totient is φ = 60805888.

The previous prime is 64606261. The next prime is 64606303. The reversal of 64606273 is 37260646.

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 56670784 + 7935489 = 7528^2 + 2817^2 .

It is a cyclic number.

It is not a de Polignac number, because 64606273 - 2²⁵ = 31051841 is a prime.

It is a Duffinian number.

64606273 is a modest number, since divided by 6273 gives 646 as remainder.

It is not an unprimeable number, because it can be changed into a prime (64606673) 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, 1900168 + ... + 1900201.

It is an arithmetic number, because the mean of its divisors is an integer number (17101665).

Almost surely, 2^64606273 is an apocalyptic number.

It is an amenable number.

64606273 is a deficient number, since it is larger than the sum of its proper divisors (3800387).

64606273 is a wasteful number, since it uses less digits than its factorization.

64606273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800386.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 64606273 is about 8037.8027470199. The cubic root of 64606273 is about 401.2591012516.

The spelling of 64606273 in words is "sixty-four million, six hundred six thousand, two hundred seventy-three".