112720689 has 9 divisors (see below), whose sum is σ = 162864793. Its totient is φ = 75125892.

The previous prime is 112720679. The next prime is 112720691. The reversal of 112720689 is 986027211.

The square root of 112720689 is 10617.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 112720689 - 2²⁵ = 79166257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112720609) 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, 30082 + ... + 33620.

Almost surely, 2^112720689 is an apocalyptic number.

112720689 is the 10617-th square number.

112720689 is the 5309-th centered octagonal number.

It is an amenable number.

112720689 is a deficient number, since it is larger than the sum of its proper divisors (50144104).

112720689 is an frugal number, since it uses more digits than its factorization.

112720689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084 (or 3542 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The cubic root of 112720689 is about 483.0601496532.

Multiplying 112720689 by its sum of digits (36), we get a square (4057944804 = 63702²).

It can be divided in two parts, 112 and 720689, that added together give a square (720801 = 849²).

The spelling of 112720689 in words is "one hundred twelve million, seven hundred twenty thousand, six hundred eighty-nine".