82125989 has 8 divisors (see below), whose sum is σ = 90063360. Its totient is φ = 74267200.

The previous prime is 82125959. The next prime is 82126013. The reversal of 82125989 is 98952128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82125989 - 2²⁰ = 81077413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82125959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17444 + ... + 21645.

It is an arithmetic number, because the mean of its divisors is an integer number (11257920).

Almost surely, 2^82125989 is an apocalyptic number.

It is an amenable number.

82125989 is a deficient number, since it is larger than the sum of its proper divisors (7937371).

82125989 is a wasteful number, since it uses less digits than its factorization.

82125989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39291.

The product of its digits is 103680, while the sum is 44.

The square root of 82125989 is about 9062.3390468466. The cubic root of 82125989 is about 434.6705375150.

The spelling of 82125989 in words is "eighty-two million, one hundred twenty-five thousand, nine hundred eighty-nine".