161369039 has 4 divisors (see below), whose sum is σ = 173782056. Its totient is φ = 148956024.

The previous prime is 161369023. The next prime is 161369041. The reversal of 161369039 is 930963161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161369039 - 2⁴ = 161369023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161368993 and 161369011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161369009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6206489 + ... + 6206514.

It is an arithmetic number, because the mean of its divisors is an integer number (43445514).

Almost surely, 2^161369039 is an apocalyptic number.

161369039 is a deficient number, since it is larger than the sum of its proper divisors (12413017).

161369039 is a wasteful number, since it uses less digits than its factorization.

161369039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12413016.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 161369039 is about 12703.1113905216. Note that the first 3 decimals coincide. The cubic root of 161369039 is about 544.4275210792.

The spelling of 161369039 in words is "one hundred sixty-one million, three hundred sixty-nine thousand, thirty-nine".