647478119 has 2 divisors, whose sum is σ = 647478120. Its totient is φ = 647478118.

The previous prime is 647478101. The next prime is 647478163. The reversal of 647478119 is 911874746.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 647478119 - 2²⁰ = 646429543 is a prime.

It is a super-2 number, since 2×647478119² = 838455829167556322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (647478179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323739059 + 323739060.

It is an arithmetic number, because the mean of its divisors is an integer number (323739060).

Almost surely, 2^647478119 is an apocalyptic number.

647478119 is a deficient number, since it is larger than the sum of its proper divisors (1).

647478119 is an equidigital number, since it uses as much as digits as its factorization.

647478119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 47.

The square root of 647478119 is about 25445.5913470291. The cubic root of 647478119 is about 865.1173703321.

The spelling of 647478119 in words is "six hundred forty-seven million, four hundred seventy-eight thousand, one hundred nineteen".