161505367 has 4 divisors (see below), whose sum is σ = 161531496. Its totient is φ = 161479240.

The previous prime is 161505359. The next prime is 161505397. The reversal of 161505367 is 763505161.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 161505367 - 2³ = 161505359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161505307) 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, 1992 + ... + 18082.

It is an arithmetic number, because the mean of its divisors is an integer number (40382874).

Almost surely, 2^161505367 is an apocalyptic number.

161505367 is a deficient number, since it is larger than the sum of its proper divisors (26129).

161505367 is a wasteful number, since it uses less digits than its factorization.

161505367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26128.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 161505367 is about 12708.4761871752. The cubic root of 161505367 is about 544.5807925788.

The spelling of 161505367 in words is "one hundred sixty-one million, five hundred five thousand, three hundred sixty-seven".