64806437 has 4 divisors (see below), whose sum is σ = 64848960. Its totient is φ = 64763916.

The previous prime is 64806421. The next prime is 64806451. The reversal of 64806437 is 73460846.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73460846 = 2 ⋅36730423.

It is a cyclic number.

It is not a de Polignac number, because 64806437 - 2⁴ = 64806421 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 64806437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64806037) 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, 18887 + ... + 22052.

It is an arithmetic number, because the mean of its divisors is an integer number (16212240).

Almost surely, 2^64806437 is an apocalyptic number.

It is an amenable number.

64806437 is a deficient number, since it is larger than the sum of its proper divisors (42523).

64806437 is a wasteful number, since it uses less digits than its factorization.

64806437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42522.

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 64806437 is about 8050.2445304475. The cubic root of 64806437 is about 401.6730694234.

The spelling of 64806437 in words is "sixty-four million, eight hundred six thousand, four hundred thirty-seven".