161447859 has 12 divisors (see below), whose sum is σ = 233749152. Its totient is φ = 107379600.

The previous prime is 161447849. The next prime is 161447899. The reversal of 161447859 is 958744161.

It is not a de Polignac number, because 161447859 - 2⁹ = 161447347 is a prime.

It is a super-2 number, since 2×161447859² = 52130822351367762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161447849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16932 + ... + 24689.

It is an arithmetic number, because the mean of its divisors is an integer number (19479096).

Almost surely, 2^161447859 is an apocalyptic number.

161447859 is a deficient number, since it is larger than the sum of its proper divisors (72301293).

161447859 is a wasteful number, since it uses less digits than its factorization.

161447859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42058 (or 42055 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 161447859 is about 12706.2134013246. The cubic root of 161447859 is about 544.5161477300.

The spelling of 161447859 in words is "one hundred sixty-one million, four hundred forty-seven thousand, eight hundred fifty-nine".