872109723 has 16 divisors (see below), whose sum is σ = 1172365056. Its totient is φ = 576644640.

The previous prime is 872109697. The next prime is 872109731. The reversal of 872109723 is 327901278.

It is not a de Polignac number, because 872109723 - 2⁹ = 872109211 is a prime.

It is a super-2 number, since 2×872109723² = 1521150737902273458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (872109743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320338 + ... + 323048.

It is an arithmetic number, because the mean of its divisors is an integer number (73272816).

Almost surely, 2^872109723 is an apocalyptic number.

872109723 is a deficient number, since it is larger than the sum of its proper divisors (300255333).

872109723 is a wasteful number, since it uses less digits than its factorization.

872109723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 872109723 is about 29531.5039068450. The cubic root of 872109723 is about 955.4113057031.

The spelling of 872109723 in words is "eight hundred seventy-two million, one hundred nine thousand, seven hundred twenty-three".