7897825989 has 12 divisors (see below), whose sum is σ = 11438076000. Its totient is φ = 5251322664.

The previous prime is 7897825961. The next prime is 7897825993. The reversal of 7897825989 is 9895287987.

It is not a de Polignac number, because 7897825989 - 2⁹ = 7897825477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897835989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1154289 + ... + 1161110.

It is an arithmetic number, because the mean of its divisors is an integer number (953173000).

Almost surely, 2^7897825989 is an apocalyptic number.

It is an amenable number.

7897825989 is a deficient number, since it is larger than the sum of its proper divisors (3540250011).

7897825989 is a wasteful number, since it uses less digits than its factorization.

7897825989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315784 (or 2315781 counting only the distinct ones).

The product of its digits is 182891520, while the sum is 72.

The square root of 7897825989 is about 88869.7135642959. The cubic root of 7897825989 is about 1991.4489913125.

The spelling of 7897825989 in words is "seven billion, eight hundred ninety-seven million, eight hundred twenty-five thousand, nine hundred eighty-nine".