161539033 has 2 divisors, whose sum is σ = 161539034. Its totient is φ = 161539032.

The previous prime is 161539009. The next prime is 161539039. The reversal of 161539033 is 330935161.

161539033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113486409 + 48052624 = 10653^2 + 6932^2 .

It is a cyclic number.

It is not a de Polignac number, because 161539033 - 2⁹ = 161538521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161538986 and 161539004.

It is not a weakly prime, because it can be changed into another prime (161539039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80769516 + 80769517.

It is an arithmetic number, because the mean of its divisors is an integer number (80769517).

Almost surely, 2^161539033 is an apocalyptic number.

It is an amenable number.

161539033 is a deficient number, since it is larger than the sum of its proper divisors (1).

161539033 is an equidigital number, since it uses as much as digits as its factorization.

161539033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7290, while the sum is 31.

The square root of 161539033 is about 12709.8006672017. The cubic root of 161539033 is about 544.6186294704.

The spelling of 161539033 in words is "one hundred sixty-one million, five hundred thirty-nine thousand, thirty-three".