64320407 has 2 divisors, whose sum is σ = 64320408. Its totient is φ = 64320406.

The previous prime is 64320383. The next prime is 64320427. The reversal of 64320407 is 70402346.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64320407 - 2¹⁰ = 64319383 is a prime.

It is a super-2 number, since 2×64320407² = 8274229513291298, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64320427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32160203 + 32160204.

It is an arithmetic number, because the mean of its divisors is an integer number (32160204).

Almost surely, 2^64320407 is an apocalyptic number.

64320407 is a deficient number, since it is larger than the sum of its proper divisors (1).

64320407 is an equidigital number, since it uses as much as digits as its factorization.

64320407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 64320407 is about 8020.0004364090. Note that the first 3 decimals coincide. The cubic root of 64320407 is about 400.6664037319. Note that the first 3 decimals are identical.

The spelling of 64320407 in words is "sixty-four million, three hundred twenty thousand, four hundred seven".