64821359 has 2 divisors, whose sum is σ = 64821360. Its totient is φ = 64821358.

The previous prime is 64821343. The next prime is 64821371. The reversal of 64821359 is 95312846.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64821359 - 2⁴ = 64821343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64821859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32410679 + 32410680.

It is an arithmetic number, because the mean of its divisors is an integer number (32410680).

Almost surely, 2^64821359 is an apocalyptic number.

64821359 is a deficient number, since it is larger than the sum of its proper divisors (1).

64821359 is an equidigital number, since it uses as much as digits as its factorization.

64821359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 64821359 is about 8051.1712812485. The cubic root of 64821359 is about 401.7038961224.

The spelling of 64821359 in words is "sixty-four million, eight hundred twenty-one thousand, three hundred fifty-nine".