161006617 has 4 divisors (see below), whose sum is σ = 161199360. Its totient is φ = 160813876.

The previous prime is 161006611. The next prime is 161006621. The reversal of 161006617 is 716600161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 716600161 = 1619 ⋅442619.

It is a cyclic number.

It is not a de Polignac number, because 161006617 - 2²³ = 152618009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161006611) 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 3 ways as a sum of consecutive naturals, for example, 95113 + ... + 96790.

It is an arithmetic number, because the mean of its divisors is an integer number (40299840).

Almost surely, 2^161006617 is an apocalyptic number.

It is an amenable number.

161006617 is a deficient number, since it is larger than the sum of its proper divisors (192743).

161006617 is an equidigital number, since it uses as much as digits as its factorization.

161006617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192742.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 161006617 is about 12688.8382840984. The cubic root of 161006617 is about 544.0196352936.

Adding to 161006617 its reverse (716600161), we get a palindrome (877606778).

The spelling of 161006617 in words is "one hundred sixty-one million, six thousand, six hundred seventeen".