161567369 has 4 divisors (see below), whose sum is σ = 162470160. Its totient is φ = 160664580.

The previous prime is 161567353. The next prime is 161567407. The reversal of 161567369 is 963765161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 161567369 - 2⁴ = 161567353 is a prime.

It is a super-2 number, since 2×161567369² = 52208029451164322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161567309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451127 + ... + 451484.

It is an arithmetic number, because the mean of its divisors is an integer number (40617540).

Almost surely, 2^161567369 is an apocalyptic number.

It is an amenable number.

161567369 is a deficient number, since it is larger than the sum of its proper divisors (902791).

161567369 is an equidigital number, since it uses as much as digits as its factorization.

161567369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902790.

The product of its digits is 204120, while the sum is 44.

The square root of 161567369 is about 12710.9153486285. The cubic root of 161567369 is about 544.6504719524.

The spelling of 161567369 in words is "one hundred sixty-one million, five hundred sixty-seven thousand, three hundred sixty-nine".