64723453 has 4 divisors (see below), whose sum is σ = 64740508. Its totient is φ = 64706400.

The previous prime is 64723429. The next prime is 64723457. The reversal of 64723453 is 35432746.

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 37234404 + 27489049 = 6102^2 + 5243^2 .

It is a cyclic number.

It is not a de Polignac number, because 64723453 - 2²¹ = 62626301 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 (64723457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25 + ... + 11377.

It is an arithmetic number, because the mean of its divisors is an integer number (16185127).

Almost surely, 2^64723453 is an apocalyptic number.

It is an amenable number.

64723453 is a deficient number, since it is larger than the sum of its proper divisors (17055).

64723453 is a wasteful number, since it uses less digits than its factorization.

64723453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17054.

The product of its digits is 60480, while the sum is 34.

The square root of 64723453 is about 8045.0887502873. The cubic root of 64723453 is about 401.5015500654.

The spelling of 64723453 in words is "sixty-four million, seven hundred twenty-three thousand, four hundred fifty-three".