161768793 has 12 divisors (see below), whose sum is σ = 227642928. Its totient is φ = 102169080.

The previous prime is 161768791. The next prime is 161768801. The reversal of 161768793 is 397867161.

It is a happy number.

It is not a de Polignac number, because 161768793 - 2¹ = 161768791 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161768791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73603 + ... + 75768.

It is an arithmetic number, because the mean of its divisors is an integer number (18970244).

Almost surely, 2^161768793 is an apocalyptic number.

It is an amenable number.

161768793 is a deficient number, since it is larger than the sum of its proper divisors (65874135).

161768793 is a wasteful number, since it uses less digits than its factorization.

161768793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149412 (or 149393 counting only the distinct ones).

The product of its digits is 381024, while the sum is 48.

The square root of 161768793 is about 12718.8361495854. The cubic root of 161768793 is about 544.8767142506.

The spelling of 161768793 in words is "one hundred sixty-one million, seven hundred sixty-eight thousand, seven hundred ninety-three".