161383711 has 4 divisors (see below), whose sum is σ = 161498232. Its totient is φ = 161269192.

The previous prime is 161383693. The next prime is 161383721. The reversal of 161383711 is 117383161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 117383161 = 7 ⋅16769023.

It is a cyclic number.

It is not a de Polignac number, because 161383711 - 2⁷ = 161383583 is a prime.

It is a super-2 number, since 2×161383711² = 52089404352263042, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161383721) 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, 55120 + ... + 57973.

It is an arithmetic number, because the mean of its divisors is an integer number (40374558).

Almost surely, 2^161383711 is an apocalyptic number.

161383711 is a deficient number, since it is larger than the sum of its proper divisors (114521).

161383711 is a wasteful number, since it uses less digits than its factorization.

161383711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114520.

The product of its digits is 3024, while the sum is 31.

The square root of 161383711 is about 12703.6888737091. The cubic root of 161383711 is about 544.4440207302. Note that the first 3 decimals are identical.

The spelling of 161383711 in words is "one hundred sixty-one million, three hundred eighty-three thousand, seven hundred eleven".