161769141 has 6 divisors (see below), whose sum is σ = 233666550. Its totient is φ = 107846088.

The previous prime is 161769107. The next prime is 161769203. The reversal of 161769141 is 141967161.

161769141 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 118919025 + 42850116 = 10905^2 + 6546^2 .

It is not a de Polignac number, because 161769141 - 2⁶ = 161769077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161769096 and 161769105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161769941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8987166 + ... + 8987183.

It is an arithmetic number, because the mean of its divisors is an integer number (38944425).

Almost surely, 2^161769141 is an apocalyptic number.

It is an amenable number.

161769141 is a deficient number, since it is larger than the sum of its proper divisors (71897409).

161769141 is a wasteful number, since it uses less digits than its factorization.

161769141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17974355 (or 17974352 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 161769141 is about 12718.8498300750. The cubic root of 161769141 is about 544.8771049666.

The spelling of 161769141 in words is "one hundred sixty-one million, seven hundred sixty-nine thousand, one hundred forty-one".