64360421 has 2 divisors, whose sum is σ = 64360422. Its totient is φ = 64360420.

The previous prime is 64360411. The next prime is 64360451. The reversal of 64360421 is 12406346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54184321 + 10176100 = 7361^2 + 3190^2 .

It is a cyclic number.

It is not a de Polignac number, because 64360421 - 2¹⁴ = 64344037 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64360411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32180210 + 32180211.

It is an arithmetic number, because the mean of its divisors is an integer number (32180211).

Almost surely, 2^64360421 is an apocalyptic number.

It is an amenable number.

64360421 is a deficient number, since it is larger than the sum of its proper divisors (1).

64360421 is an equidigital number, since it uses as much as digits as its factorization.

64360421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 64360421 is about 8022.4946868166. The cubic root of 64360421 is about 400.7494719358.

Adding to 64360421 its reverse (12406346), we get a palindrome (76766767).

The spelling of 64360421 in words is "sixty-four million, three hundred sixty thousand, four hundred twenty-one".