161713201 has 8 divisors (see below), whose sum is σ = 174264104. Its totient is φ = 149178240.

The previous prime is 161713147. The next prime is 161713213. The reversal of 161713201 is 102317161.

It can be written as a sum of positive squares in 4 ways, for example, as 2322576 + 159390625 = 1524^2 + 12625^2 .

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 161713201 - 2⁷ = 161713073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161713241) 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, 24871 + ... + 30691.

It is an arithmetic number, because the mean of its divisors is an integer number (21783013).

Almost surely, 2^161713201 is an apocalyptic number.

It is an amenable number.

161713201 is a deficient number, since it is larger than the sum of its proper divisors (12550903).

161713201 is a wasteful number, since it uses less digits than its factorization.

161713201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7971.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 161713201 is about 12716.6505417111. The cubic root of 161713201 is about 544.8142912987.

The spelling of 161713201 in words is "one hundred sixty-one million, seven hundred thirteen thousand, two hundred one".