161633 has 8 divisors (see below), whose sum is σ = 174720. Its totient is φ = 149040.

The previous prime is 161627. The next prime is 161639. The reversal of 161633 is 336161.

It is an interprime number because it is at equal distance from previous prime (161627) and next prime (161639).

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 161633 - 2⁶ = 161569 is a prime.

It is a super-2 number, since 2×161633² = 52250453378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161639) 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, 803 + ... + 983.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2¹⁶¹⁶³³ is an apocalyptic number.

It is an amenable number.

161633 is a deficient number, since it is larger than the sum of its proper divisors (13087).

161633 is a wasteful number, since it uses less digits than its factorization.

161633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its digits is 324, while the sum is 20.

The square root of 161633 is about 402.0360680337. The cubic root of 161633 is about 54.4724210266.

Adding to 161633 its reverse (336161), we get a palindrome (497794).

The spelling of 161633 in words is "one hundred sixty-one thousand, six hundred thirty-three".