64104421 has 2 divisors, whose sum is σ = 64104422. Its totient is φ = 64104420.

The previous prime is 64104389. The next prime is 64104431. The reversal of 64104421 is 12440146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62252100 + 1852321 = 7890^2 + 1361^2 .

It is a cyclic number.

It is not a de Polignac number, because 64104421 - 2⁵ = 64104389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64104392 and 64104401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64104431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32052210 + 32052211.

It is an arithmetic number, because the mean of its divisors is an integer number (32052211).

Almost surely, 2^64104421 is an apocalyptic number.

It is an amenable number.

64104421 is a deficient number, since it is larger than the sum of its proper divisors (1).

64104421 is an equidigital number, since it uses as much as digits as its factorization.

64104421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 64104421 is about 8006.5236526223. The cubic root of 64104421 is about 400.2174255439.

Adding to 64104421 its reverse (12440146), we get a palindrome (76544567).

The spelling of 64104421 in words is "sixty-four million, one hundred four thousand, four hundred twenty-one".