1989972725 has 24 divisors (see below), whose sum is σ = 2689432032. Its totient is φ = 1451793600.

The previous prime is 1989972707. The next prime is 1989972727. The reversal of 1989972725 is 5272799891.

It is not a de Polignac number, because 1989972725 - 2²⁴ = 1973195509 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 (1989972727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9911 + ... + 63860.

It is an arithmetic number, because the mean of its divisors is an integer number (112059668).

Almost surely, 2^1989972725 is an apocalyptic number.

It is an amenable number.

1989972725 is a deficient number, since it is larger than the sum of its proper divisors (699459307).

1989972725 is a wasteful number, since it uses less digits than its factorization.

1989972725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73877 (or 73872 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 59.

The square root of 1989972725 is about 44609.1103363427. The cubic root of 1989972725 is about 1257.8119253550.

The spelling of 1989972725 in words is "one billion, nine hundred eighty-nine million, nine hundred seventy-two thousand, seven hundred twenty-five".