609181019 has 2 divisors, whose sum is σ = 609181020. Its totient is φ = 609181018.

The previous prime is 609181007. The next prime is 609181051. The reversal of 609181019 is 910181906.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-609181019 is a prime.

It is a super-2 number, since 2×609181019² = 742203027819756722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 609181019.

It is not a weakly prime, because it can be changed into another prime (609184019) 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, 304590509 + 304590510.

It is an arithmetic number, because the mean of its divisors is an integer number (304590510).

Almost surely, 2^609181019 is an apocalyptic number.

609181019 is a deficient number, since it is larger than the sum of its proper divisors (1).

609181019 is an equidigital number, since it uses as much as digits as its factorization.

609181019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 609181019 is about 24681.5927160303. The cubic root of 609181019 is about 847.7128914679.

The spelling of 609181019 in words is "six hundred nine million, one hundred eighty-one thousand, nineteen".