161473019 has 2 divisors, whose sum is σ = 161473020. Its totient is φ = 161473018.

The previous prime is 161472991. The next prime is 161473031. The reversal of 161473019 is 910374161.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161473019 is a prime.

It is a super-2 number, since 2×161473019² = 52147071729948722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161473049) 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, 80736509 + 80736510.

It is an arithmetic number, because the mean of its divisors is an integer number (80736510).

Almost surely, 2^161473019 is an apocalyptic number.

161473019 is a deficient number, since it is larger than the sum of its proper divisors (1).

161473019 is an equidigital number, since it uses as much as digits as its factorization.

161473019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 161473019 is about 12707.2034295513. The cubic root of 161473019 is about 544.5444320210.

The spelling of 161473019 in words is "one hundred sixty-one million, four hundred seventy-three thousand, nineteen".