161687017 has 8 divisors (see below), whose sum is σ = 180208800. Its totient is φ = 144166464.

The previous prime is 161686999. The next prime is 161687021. The reversal of 161687017 is 710786161.

161687017 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161687017 - 2¹¹ = 161684969 is a prime.

It is a super-2 number, since 2×161687017² = 52285382932716578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161687087) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249967 + ... + 250612.

It is an arithmetic number, because the mean of its divisors is an integer number (22526100).

Almost surely, 2^161687017 is an apocalyptic number.

161687017 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

161687017 is a deficient number, since it is larger than the sum of its proper divisors (18521783).

161687017 is a wasteful number, since it uses less digits than its factorization.

161687017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500615.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 161687017 is about 12715.6209836563. The cubic root of 161687017 is about 544.7848849437.

The spelling of 161687017 in words is "one hundred sixty-one million, six hundred eighty-seven thousand, seventeen".