64123399 has 2 divisors, whose sum is σ = 64123400. Its totient is φ = 64123398.

The previous prime is 64123391. The next prime is 64123421. The reversal of 64123399 is 99332146.

64123399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64123399 - 2³ = 64123391 is a prime.

It is a super-2 number, since 2×64123399² = 8223620598626402, 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 (64123391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32061699 + 32061700.

It is an arithmetic number, because the mean of its divisors is an integer number (32061700).

Almost surely, 2^64123399 is an apocalyptic number.

64123399 is a deficient number, since it is larger than the sum of its proper divisors (1).

64123399 is an equidigital number, since it uses as much as digits as its factorization.

64123399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 64123399 is about 8007.7087234739. The cubic root of 64123399 is about 400.2569161998.

The spelling of 64123399 in words is "sixty-four million, one hundred twenty-three thousand, three hundred ninety-nine".