1972989 has 12 divisors (see below), whose sum is σ = 2864316. Its totient is φ = 1308672.

The previous prime is 1972987. The next prime is 1973011. The reversal of 1972989 is 9892791.

It can be written as a sum of positive squares in 2 ways, for example, as 1102500 + 870489 = 1050^2 + 933^2 .

It is not a de Polignac number, because 1972989 - 2¹ = 1972987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1887 + ... + 2739.

It is an arithmetic number, because the mean of its divisors is an integer number (238693).

2^1972989 is an apocalyptic number.

It is an amenable number.

1972989 is a deficient number, since it is larger than the sum of its proper divisors (891327).

1972989 is a wasteful number, since it uses less digits than its factorization.

1972989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116 (or 1113 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 1972989 is about 1404.6312683406. The cubic root of 1972989 is about 125.4223367794.

The spelling of 1972989 in words is "one million, nine hundred seventy-two thousand, nine hundred eighty-nine".