64281773 has 2 divisors, whose sum is σ = 64281774. Its totient is φ = 64281772.

The previous prime is 64281733. The next prime is 64281779. The reversal of 64281773 is 37718246.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44049769 + 20232004 = 6637^2 + 4498^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64281773 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64281779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32140886 + 32140887.

It is an arithmetic number, because the mean of its divisors is an integer number (32140887).

Almost surely, 2^64281773 is an apocalyptic number.

It is an amenable number.

64281773 is a deficient number, since it is larger than the sum of its proper divisors (1).

64281773 is an equidigital number, since it uses as much as digits as its factorization.

64281773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 38.

The square root of 64281773 is about 8017.5914712587. The cubic root of 64281773 is about 400.5861676824.

The spelling of 64281773 in words is "sixty-four million, two hundred eighty-one thousand, seven hundred seventy-three".