1057686447 has 4 divisors (see below), whose sum is σ = 1410248600. Its totient is φ = 705124296.

The previous prime is 1057686439. The next prime is 1057686473. The reversal of 1057686447 is 7446867501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7446867501 = 3 ⋅2482289167.

It is not a de Polignac number, because 1057686447 - 2³ = 1057686439 is a prime.

It is a super-2 number, since 2×1057686447² = 2237401240334967618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1057686396 and 1057686405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1057686407) 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 3 ways as a sum of consecutive naturals, for example, 176281072 + ... + 176281077.

It is an arithmetic number, because the mean of its divisors is an integer number (352562150).

Almost surely, 2^1057686447 is an apocalyptic number.

1057686447 is a deficient number, since it is larger than the sum of its proper divisors (352562153).

1057686447 is an equidigital number, since it uses as much as digits as its factorization.

1057686447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352562152.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The square root of 1057686447 is about 32522.0916762745. The cubic root of 1057686447 is about 1018.8704807288.

The spelling of 1057686447 in words is "one billion, fifty-seven million, six hundred eighty-six thousand, four hundred forty-seven".