1972857489 has 16 divisors (see below), whose sum is σ = 2660572992. Its totient is φ = 1300220928.

The previous prime is 1972857487. The next prime is 1972857493. The reversal of 1972857489 is 9847582791.

It is not a de Polignac number, because 1972857489 - 2¹ = 1972857487 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1972857487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 297322 + ... + 303884.

It is an arithmetic number, because the mean of its divisors is an integer number (166285812).

Almost surely, 2^1972857489 is an apocalyptic number.

It is an amenable number.

1972857489 is a deficient number, since it is larger than the sum of its proper divisors (687715503).

1972857489 is a wasteful number, since it uses less digits than its factorization.

1972857489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7696.

The product of its digits is 10160640, while the sum is 60.

The square root of 1972857489 is about 44416.8604135862. The cubic root of 1972857489 is about 1254.1955001216.

The spelling of 1972857489 in words is "one billion, nine hundred seventy-two million, eight hundred fifty-seven thousand, four hundred eighty-nine".