64213273 has 2 divisors, whose sum is σ = 64213274. Its totient is φ = 64213272.

The previous prime is 64213271. The next prime is 64213283. The reversal of 64213273 is 37231246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49674304 + 14538969 = 7048^2 + 3813^2 .

It is a cyclic number.

It is not a de Polignac number, because 64213273 - 2¹ = 64213271 is a prime.

Together with 64213271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (64213271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32106636 + 32106637.

It is an arithmetic number, because the mean of its divisors is an integer number (32106637).

Almost surely, 2^64213273 is an apocalyptic number.

It is an amenable number.

64213273 is a deficient number, since it is larger than the sum of its proper divisors (1).

64213273 is an equidigital number, since it uses as much as digits as its factorization.

64213273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 64213273 is about 8013.3184761371. The cubic root of 64213273 is about 400.4438261138.

The spelling of 64213273 in words is "sixty-four million, two hundred thirteen thousand, two hundred seventy-three".