161386039 has 4 divisors (see below), whose sum is σ = 161670240. Its totient is φ = 161101840.

The previous prime is 161386033. The next prime is 161386061. The reversal of 161386039 is 930683161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930683161 = 61 ⋅15257101.

It is a cyclic number.

It is not a de Polignac number, because 161386039 - 2¹¹ = 161383991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161385989 and 161386007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161386033) 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, 141247 + ... + 142384.

It is an arithmetic number, because the mean of its divisors is an integer number (40417560).

Almost surely, 2^161386039 is an apocalyptic number.

161386039 is a deficient number, since it is larger than the sum of its proper divisors (284201).

161386039 is an equidigital number, since it uses as much as digits as its factorization.

161386039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284200.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 161386039 is about 12703.7805003078. The cubic root of 161386039 is about 544.4466386309.

The spelling of 161386039 in words is "one hundred sixty-one million, three hundred eighty-six thousand, thirty-nine".