161792287 has 4 divisors (see below), whose sum is σ = 161852040. Its totient is φ = 161732536.

The previous prime is 161792269. The next prime is 161792321. The reversal of 161792287 is 782297161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161792287 - 2¹⁹ = 161267999 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 (161792227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25612 + ... + 31297.

It is an arithmetic number, because the mean of its divisors is an integer number (40463010).

Almost surely, 2^161792287 is an apocalyptic number.

161792287 is a deficient number, since it is larger than the sum of its proper divisors (59753).

161792287 is an equidigital number, since it uses as much as digits as its factorization.

161792287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59752.

The product of its digits is 84672, while the sum is 43.

The square root of 161792287 is about 12719.7597068498. The cubic root of 161792287 is about 544.9030908128.

The spelling of 161792287 in words is "one hundred sixty-one million, seven hundred ninety-two thousand, two hundred eighty-seven".