1973723166 has 16 divisors (see below), whose sum is σ = 4386051600. Its totient is φ = 657907704.

The previous prime is 1973723111. The next prime is 1973723179. The reversal of 1973723166 is 6613273791.

1973723166 is a `hidden beast` number, since 197 + 372 + 31 + 66 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18275161 + ... + 18275268.

It is an arithmetic number, because the mean of its divisors is an integer number (274128225).

Almost surely, 2^1973723166 is an apocalyptic number.

1973723166 is an abundant number, since it is smaller than the sum of its proper divisors (2412328434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1973723166 is a wasteful number, since it uses less digits than its factorization.

1973723166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36550440 (or 36550434 counting only the distinct ones).

The product of its digits is 285768, while the sum is 45.

The square root of 1973723166 is about 44426.6042591598. The cubic root of 1973723166 is about 1254.3789175655.

The spelling of 1973723166 in words is "one billion, nine hundred seventy-three million, seven hundred twenty-three thousand, one hundred sixty-six".