1972389 has 8 divisors (see below), whose sum is σ = 2649600. Its totient is φ = 1305056.

The previous prime is 1972381. The next prime is 1972417. The reversal of 1972389 is 9832791.

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 1972389 - 2³ = 1972381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972381) 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, 1989 + ... + 2810.

It is an arithmetic number, because the mean of its divisors is an integer number (331200).

2^1972389 is an apocalyptic number.

It is an amenable number.

1972389 is a deficient number, since it is larger than the sum of its proper divisors (677211).

1972389 is a wasteful number, since it uses less digits than its factorization.

1972389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4939.

The product of its digits is 27216, while the sum is 39.

The square root of 1972389 is about 1404.4176729164. The cubic root of 1972389 is about 125.4096215486.

The spelling of 1972389 in words is "one million, nine hundred seventy-two thousand, three hundred eighty-nine".