161282887 has 6 divisors (see below), whose sum is σ = 170218608. Its totient is φ = 152793972.

The previous prime is 161282881. The next prime is 161282903. The reversal of 161282887 is 788282161.

It is a de Polignac number, because none of the positive numbers 2^k-161282887 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 (161282881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 223023 + ... + 223744.

It is an arithmetic number, because the mean of its divisors is an integer number (28369768).

Almost surely, 2^161282887 is an apocalyptic number.

161282887 is a deficient number, since it is larger than the sum of its proper divisors (8935721).

161282887 is an equidigital number, since it uses as much as digits as its factorization.

161282887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446805 (or 446786 counting only the distinct ones).

The product of its digits is 86016, while the sum is 43.

The square root of 161282887 is about 12699.7199575424. The cubic root of 161282887 is about 544.3306171759.

The spelling of 161282887 in words is "one hundred sixty-one million, two hundred eighty-two thousand, eight hundred eighty-seven".