1672073881 has 9 divisors (see below), whose sum is σ = 1692728991. Its totient is φ = 1651669272.

The previous prime is 1672073869. The next prime is 1672073911. The reversal of 1672073881 is 1883702761.

The square root of 1672073881 is 40891.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1120575625 + 551498256 = 33475^2 + 23484^2 .

It is not a de Polignac number, because 1672073881 - 2²⁹ = 1135202969 is a prime.

It is a super-2 number, since 2×1672073881² = 5591662127044804322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1672073801) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4211575 + ... + 4211971.

It is an arithmetic number, because the mean of its divisors is an integer number (188080999).

Almost surely, 2^1672073881 is an apocalyptic number.

1672073881 is the 40891-st square number.

1672073881 is the 20446-th centered octagonal number.

It is an amenable number.

1672073881 is a deficient number, since it is larger than the sum of its proper divisors (20655110).

1672073881 is an frugal number, since it uses more digits than its factorization.

1672073881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000 (or 500 counting only the distinct ones).

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

The cubic root of 1672073881 is about 1186.9119096700.

Multiplying 1672073881 by its product of nonzero digits (112896), we get a square (188770452869376 = 13739376²).

It can be divided in two parts, 16720 and 73881, that added together give a square (90601 = 301²).

The spelling of 1672073881 in words is "one billion, six hundred seventy-two million, seventy-three thousand, eight hundred eighty-one".