872723181 has 32 divisors (see below), whose sum is σ = 1372377600. Its totient is φ = 487529280.

The previous prime is 872723161. The next prime is 872723197. The reversal of 872723181 is 181327278.

It is not a de Polignac number, because 872723181 - 2⁵ = 872723149 is a prime.

It is a super-2 number, since 2×872723181² = 1523291501309517522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872723161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4390 + ... + 42008.

It is an arithmetic number, because the mean of its divisors is an integer number (42886800).

Almost surely, 2^872723181 is an apocalyptic number.

It is an amenable number.

872723181 is a deficient number, since it is larger than the sum of its proper divisors (499654419).

872723181 is a wasteful number, since it uses less digits than its factorization.

872723181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37689.

The product of its digits is 37632, while the sum is 39.

The square root of 872723181 is about 29541.8885821472. Note that the first 3 decimals coincide. The cubic root of 872723181 is about 955.6352711520.

The spelling of 872723181 in words is "eight hundred seventy-two million, seven hundred twenty-three thousand, one hundred eighty-one".