64994773 has 2 divisors, whose sum is σ = 64994774. Its totient is φ = 64994772.

The previous prime is 64994759. The next prime is 64994777. The reversal of 64994773 is 37749946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64915249 + 79524 = 8057^2 + 282^2 .

It is a cyclic number.

It is not a de Polignac number, because 64994773 - 2²¹ = 62897621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64994777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32497386 + 32497387.

It is an arithmetic number, because the mean of its divisors is an integer number (32497387).

Almost surely, 2^64994773 is an apocalyptic number.

It is an amenable number.

64994773 is a deficient number, since it is larger than the sum of its proper divisors (1).

64994773 is an equidigital number, since it uses as much as digits as its factorization.

64994773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 49.

The square root of 64994773 is about 8061.9335770025. The cubic root of 64994773 is about 402.0617979631.

The spelling of 64994773 in words is "sixty-four million, nine hundred ninety-four thousand, seven hundred seventy-three".