161692039 has 4 divisors (see below), whose sum is σ = 163123056. Its totient is φ = 160261024.

The previous prime is 161692009. The next prime is 161692057. The reversal of 161692039 is 930296161.

161692039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161692039 - 2⁹ = 161691527 is a prime.

It is a super-2 number, since 2×161692039² = 52288630951955042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161691989 and 161692007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161692009) 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, 715339 + ... + 715564.

It is an arithmetic number, because the mean of its divisors is an integer number (40780764).

Almost surely, 2^161692039 is an apocalyptic number.

161692039 is a deficient number, since it is larger than the sum of its proper divisors (1431017).

161692039 is a wasteful number, since it uses less digits than its factorization.

161692039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431016.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 161692039 is about 12715.8184557660. The cubic root of 161692039 is about 544.7905252262.

The spelling of 161692039 in words is "one hundred sixty-one million, six hundred ninety-two thousand, thirty-nine".