64373457 has 4 divisors (see below), whose sum is σ = 85831280. Its totient is φ = 42915636.

The previous prime is 64373443. The next prime is 64373471. The reversal of 64373457 is 75437346.

64373457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (64373443) and next prime (64373471).

It is not a de Polignac number, because 64373457 - 2⁸ = 64373201 is a prime.

It is a super-2 number, since 2×64373457² = 8287883932261698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64373497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10728907 + ... + 10728912.

It is an arithmetic number, because the mean of its divisors is an integer number (21457820).

Almost surely, 2^64373457 is an apocalyptic number.

It is an amenable number.

64373457 is a deficient number, since it is larger than the sum of its proper divisors (21457823).

64373457 is a wasteful number, since it uses less digits than its factorization.

64373457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21457822.

The product of its digits is 211680, while the sum is 39.

The square root of 64373457 is about 8023.3071111606. The cubic root of 64373457 is about 400.7765269559.

The spelling of 64373457 in words is "sixty-four million, three hundred seventy-three thousand, four hundred fifty-seven".