64464437 has 4 divisors (see below), whose sum is σ = 64573740. Its totient is φ = 64355136.

The previous prime is 64464431. The next prime is 64464443. The reversal of 64464437 is 73446446.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (64464431) and next prime (64464443).

It can be written as a sum of positive squares in 2 ways, for example, as 35153041 + 29311396 = 5929^2 + 5414^2 .

It is a cyclic number.

It is not a de Polignac number, because 64464437 - 2²⁰ = 63415861 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64464437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64464431) 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, 53762 + ... + 54947.

It is an arithmetic number, because the mean of its divisors is an integer number (16143435).

Almost surely, 2^64464437 is an apocalyptic number.

It is an amenable number.

64464437 is a deficient number, since it is larger than the sum of its proper divisors (109303).

64464437 is a wasteful number, since it uses less digits than its factorization.

64464437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109302.

The product of its digits is 193536, while the sum is 38.

The square root of 64464437 is about 8028.9748411612. The cubic root of 64464437 is about 400.9652459603.

Subtracting 64464437 from its reverse (73446446), we obtain a square (8982009 = 2997²).

The spelling of 64464437 in words is "sixty-four million, four hundred sixty-four thousand, four hundred thirty-seven".