1057981719 has 8 divisors (see below), whose sum is σ = 1411793152. Its totient is φ = 704745720.

The previous prime is 1057981697. The next prime is 1057981747. The reversal of 1057981719 is 9171897501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1057981719 - 2⁷ = 1057981591 is a prime.

It is a super-2 number, since 2×1057981719² = 2238650635476389922, 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 (1057981319) 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 7 ways as a sum of consecutive naturals, for example, 139549 + ... + 146934.

It is an arithmetic number, because the mean of its divisors is an integer number (176474144).

Almost surely, 2^1057981719 is an apocalyptic number.

1057981719 is a deficient number, since it is larger than the sum of its proper divisors (353811433).

1057981719 is a wasteful number, since it uses less digits than its factorization.

1057981719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287717.

The product of its (nonzero) digits is 158760, while the sum is 48.

The square root of 1057981719 is about 32526.6309199093. The cubic root of 1057981719 is about 1018.9652838514.

The spelling of 1057981719 in words is "one billion, fifty-seven million, nine hundred eighty-one thousand, seven hundred nineteen".