161030187 has 30 divisors (see below), whose sum is σ = 253924308. Its totient is φ = 101684808.

The previous prime is 161030183. The next prime is 161030197. The reversal of 161030187 is 781030161.

161030187 is a `hidden beast` number, since 1 + 610 + 30 + 18 + 7 = 666.

It is not a de Polignac number, because 161030187 - 2² = 161030183 is a prime.

It is a super-2 number, since 2×161030187² = 51861442250509938, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 161030187.

It is not an unprimeable number, because it can be changed into a prime (161030183) 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 29 ways as a sum of consecutive naturals, for example, 26488 + ... + 31994.

Almost surely, 2^161030187 is an apocalyptic number.

161030187 is a deficient number, since it is larger than the sum of its proper divisors (92894121).

161030187 is an equidigital number, since it uses as much as digits as its factorization.

161030187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557 (or 5529 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 161030187 is about 12689.7670191379. The cubic root of 161030187 is about 544.0461806150.

The spelling of 161030187 in words is "one hundred sixty-one million, thirty thousand, one hundred eighty-seven".