64163819 has 2 divisors, whose sum is σ = 64163820. Its totient is φ = 64163818.

The previous prime is 64163753. The next prime is 64163837. The reversal of 64163819 is 91836146.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64163819 - 2¹² = 64159723 is a prime.

It is a super-2 number, since 2×64163819² = 8233991337329522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (64163839) 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, 32081909 + 32081910.

It is an arithmetic number, because the mean of its divisors is an integer number (32081910).

Almost surely, 2^64163819 is an apocalyptic number.

64163819 is a deficient number, since it is larger than the sum of its proper divisors (1).

64163819 is an equidigital number, since it uses as much as digits as its factorization.

64163819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The square root of 64163819 is about 8010.2321439519. The cubic root of 64163819 is about 400.3409988003.

The spelling of 64163819 in words is "sixty-four million, one hundred sixty-three thousand, eight hundred nineteen".