64839373 has 2 divisors, whose sum is σ = 64839374. Its totient is φ = 64839372.

The previous prime is 64839371. The next prime is 64839421. The reversal of 64839373 is 37393846.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63952009 + 887364 = 7997^2 + 942^2 .

It is a cyclic number.

It is not a de Polignac number, because 64839373 - 2¹ = 64839371 is a prime.

Together with 64839371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64839371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32419686 + 32419687.

It is an arithmetic number, because the mean of its divisors is an integer number (32419687).

Almost surely, 2^64839373 is an apocalyptic number.

It is an amenable number.

64839373 is a deficient number, since it is larger than the sum of its proper divisors (1).

64839373 is an equidigital number, since it uses as much as digits as its factorization.

64839373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 43.

The square root of 64839373 is about 8052.2899227487. The cubic root of 64839373 is about 401.7411041449.

The spelling of 64839373 in words is "sixty-four million, eight hundred thirty-nine thousand, three hundred seventy-three".