64213733 has 2 divisors, whose sum is σ = 64213734. Its totient is φ = 64213732.

The previous prime is 64213717. The next prime is 64213757. The reversal of 64213733 is 33731246.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33721249 + 30492484 = 5807^2 + 5522^2 .

It is a cyclic number.

It is not a de Polignac number, because 64213733 - 2⁴ = 64213717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64213696 and 64213705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64213783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32106866 + 32106867.

It is an arithmetic number, because the mean of its divisors is an integer number (32106867).

Almost surely, 2^64213733 is an apocalyptic number.

It is an amenable number.

64213733 is a deficient number, since it is larger than the sum of its proper divisors (1).

64213733 is an equidigital number, since it uses as much as digits as its factorization.

64213733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 29.

The square root of 64213733 is about 8013.3471783020. The cubic root of 64213733 is about 400.4447823217. Note that the first 3 decimals are identical.

Adding to 64213733 its reverse (33731246), we get a palindrome (97944979).

It can be divided in two parts, 64213 and 733, that added together give a palindrome (64946).

The spelling of 64213733 in words is "sixty-four million, two hundred thirteen thousand, seven hundred thirty-three".