83120725 has 12 divisors (see below), whose sum is σ = 108495040. Its totient is φ = 62996400.

The previous prime is 83120711. The next prime is 83120747. The reversal of 83120725 is 52702138.

It is not a de Polignac number, because 83120725 - 2¹¹ = 83118677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 83120693 and 83120702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87021 + ... + 87970.

Almost surely, 2^83120725 is an apocalyptic number.

It is an amenable number.

83120725 is a deficient number, since it is larger than the sum of its proper divisors (25374315).

83120725 is a wasteful number, since it uses less digits than its factorization.

83120725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175020 (or 175015 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 83120725 is about 9117.0568167584. The cubic root of 83120725 is about 436.4184550436.

It can be divided in two parts, 83120 and 725, that added together give a triangular number (83845 = T₄₀₉).

The spelling of 83120725 in words is "eighty-three million, one hundred twenty thousand, seven hundred twenty-five".