161707859 has 8 divisors (see below), whose sum is σ = 172737360. Its totient is φ = 150846976.

The previous prime is 161707831. The next prime is 161707883. The reversal of 161707859 is 958707161.

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 161707859 - 2¹⁶ = 161642323 is a prime.

It is a super-2 number, since 2×161707859² = 52298863324727762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161707829) 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, 40169 + ... + 44010.

It is an arithmetic number, because the mean of its divisors is an integer number (21592170).

Almost surely, 2^161707859 is an apocalyptic number.

161707859 is a deficient number, since it is larger than the sum of its proper divisors (11029501).

161707859 is a wasteful number, since it uses less digits than its factorization.

161707859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84309.

The product of its (nonzero) digits is 105840, while the sum is 44.

The square root of 161707859 is about 12716.4405003916. The cubic root of 161707859 is about 544.8082921389.

The spelling of 161707859 in words is "one hundred sixty-one million, seven hundred seven thousand, eight hundred fifty-nine".