1057309843 has 4 divisors (see below), whose sum is σ = 1081898488. Its totient is φ = 1032721200.

The previous prime is 1057309837. The next prime is 1057309867. The reversal of 1057309843 is 3489037501.

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 1057309843 - 2²⁹ = 520438931 is a prime.

It is a super-2 number, since 2×1057309843² = 2235808208209369298, 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 = 1057309796 and 1057309805.

It is not an unprimeable number, because it can be changed into a prime (1057300843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12294258 + ... + 12294343.

It is an arithmetic number, because the mean of its divisors is an integer number (270474622).

Almost surely, 2^1057309843 is an apocalyptic number.

1057309843 is a deficient number, since it is larger than the sum of its proper divisors (24588645).

1057309843 is an equidigital number, since it uses as much as digits as its factorization.

1057309843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24588644.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 1057309843 is about 32516.3011887884. The cubic root of 1057309843 is about 1018.7495386953.

The spelling of 1057309843 in words is "one billion, fifty-seven million, three hundred nine thousand, eight hundred forty-three".