161463391 has 2 divisors, whose sum is σ = 161463392. Its totient is φ = 161463390.

The previous prime is 161463361. The next prime is 161463451. The reversal of 161463391 is 193364161.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (193364161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161463391 - 2¹¹ = 161461343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161463361) 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, 80731695 + 80731696.

It is an arithmetic number, because the mean of its divisors is an integer number (80731696).

Almost surely, 2^161463391 is an apocalyptic number.

161463391 is a deficient number, since it is larger than the sum of its proper divisors (1).

161463391 is an equidigital number, since it uses as much as digits as its factorization.

161463391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 161463391 is about 12706.8245836637. The cubic root of 161463391 is about 544.5336087928.

The spelling of 161463391 in words is "one hundred sixty-one million, four hundred sixty-three thousand, three hundred ninety-one".