1057686673 has 4 divisors (see below), whose sum is σ = 1057811968. Its totient is φ = 1057561380.

The previous prime is 1057686659. The next prime is 1057686689. The reversal of 1057686673 is 3766867501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3766867501 = 67 ⋅56221903.

It is a cyclic number.

It is not a de Polignac number, because 1057686673 - 2¹³ = 1057678481 is a prime.

It is a super-2 number, since 2×1057686673² = 2237402196483617858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057686473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48993 + ... + 67198.

It is an arithmetic number, because the mean of its divisors is an integer number (264452992).

Almost surely, 2^1057686673 is an apocalyptic number.

It is an amenable number.

1057686673 is a deficient number, since it is larger than the sum of its proper divisors (125295).

1057686673 is an equidigital number, since it uses as much as digits as its factorization.

1057686673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125294.

The product of its (nonzero) digits is 1270080, while the sum is 49.

The square root of 1057686673 is about 32522.0951508355. The cubic root of 1057686673 is about 1018.8705532975.

The spelling of 1057686673 in words is "one billion, fifty-seven million, six hundred eighty-six thousand, six hundred seventy-three".