1972857119 has 4 divisors (see below), whose sum is σ = 1991295144. Its totient is φ = 1954419096.

The previous prime is 1972857113. The next prime is 1972857121. The reversal of 1972857119 is 9117582791.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1972857119 - 2¹² = 1972853023 is a prime.

It is a super-2 number, since 2×1972857119² = 7784330423977960322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972857113) 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 3 ways as a sum of consecutive naturals, for example, 9218852 + ... + 9219065.

It is an arithmetic number, because the mean of its divisors is an integer number (497823786).

Almost surely, 2^1972857119 is an apocalyptic number.

1972857119 is a deficient number, since it is larger than the sum of its proper divisors (18438025).

1972857119 is a wasteful number, since it uses less digits than its factorization.

1972857119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18438024.

The product of its digits is 317520, while the sum is 50.

The square root of 1972857119 is about 44416.8562485010. The cubic root of 1972857119 is about 1254.1954217155.

The spelling of 1972857119 in words is "one billion, nine hundred seventy-two million, eight hundred fifty-seven thousand, one hundred nineteen".