161339933 has 4 divisors (see below), whose sum is σ = 161380128. Its totient is φ = 161299740.

The previous prime is 161339929. The next prime is 161339939. The reversal of 161339933 is 339933161.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 161339933 - 2² = 161339929 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161339939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13313 + ... + 22358.

It is an arithmetic number, because the mean of its divisors is an integer number (40345032).

Almost surely, 2^161339933 is an apocalyptic number.

It is an amenable number.

161339933 is a deficient number, since it is larger than the sum of its proper divisors (40195).

161339933 is an equidigital number, since it uses as much as digits as its factorization.

161339933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40194.

The product of its digits is 39366, while the sum is 38.

The square root of 161339933 is about 12701.9657140145. The cubic root of 161339933 is about 544.3947864639.

The spelling of 161339933 in words is "one hundred sixty-one million, three hundred thirty-nine thousand, nine hundred thirty-three".