64163903 has 2 divisors, whose sum is σ = 64163904. Its totient is φ = 64163902.

The previous prime is 64163881. The next prime is 64163909. The reversal of 64163903 is 30936146.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64163903 - 2⁶ = 64163839 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64163903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64163909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32081951 + 32081952.

It is an arithmetic number, because the mean of its divisors is an integer number (32081952).

Almost surely, 2^64163903 is an apocalyptic number.

64163903 is a deficient number, since it is larger than the sum of its proper divisors (1).

64163903 is an equidigital number, since it uses as much as digits as its factorization.

64163903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 64163903 is about 8010.2373872439. The cubic root of 64163903 is about 400.3411735022.

The spelling of 64163903 in words is "sixty-four million, one hundred sixty-three thousand, nine hundred three".