64843237 has 2 divisors, whose sum is σ = 64843238. Its totient is φ = 64843236.

The previous prime is 64843223. The next prime is 64843241. The reversal of 64843237 is 73234846.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47320641 + 17522596 = 6879^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 64843237 - 2¹⁵ = 64810469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64843196 and 64843205.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32421618 + 32421619.

It is an arithmetic number, because the mean of its divisors is an integer number (32421619).

Almost surely, 2^64843237 is an apocalyptic number.

It is an amenable number.

64843237 is a deficient number, since it is larger than the sum of its proper divisors (1).

64843237 is an equidigital number, since it uses as much as digits as its factorization.

64843237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 37.

The square root of 64843237 is about 8052.5298509226. The cubic root of 64843237 is about 401.7490843619.

The spelling of 64843237 in words is "sixty-four million, eight hundred forty-three thousand, two hundred thirty-seven".