161723788 has 12 divisors (see below), whose sum is σ = 299664792. Its totient is φ = 76105280.

The previous prime is 161723777. The next prime is 161723789. The reversal of 161723788 is 887327161.

161723788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×161723788³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (161723789) 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, 1189078 + ... + 1189213.

It is an arithmetic number, because the mean of its divisors is an integer number (24972066).

Almost surely, 2^161723788 is an apocalyptic number.

It is an amenable number.

161723788 is a deficient number, since it is larger than the sum of its proper divisors (137941004).

161723788 is a wasteful number, since it uses less digits than its factorization.

161723788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378312 (or 2378310 counting only the distinct ones).

The product of its digits is 112896, while the sum is 43.

The square root of 161723788 is about 12717.0668001705. The cubic root of 161723788 is about 544.8261802952.

The spelling of 161723788 in words is "one hundred sixty-one million, seven hundred twenty-three thousand, seven hundred eighty-eight".