1057996823 has 4 divisors (see below), whose sum is σ = 1139381208. Its totient is φ = 976612440.

The previous prime is 1057996801. The next prime is 1057996829. The reversal of 1057996823 is 3286997501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3286997501 = 191 ⋅17209411.

It is a cyclic number.

It is not a de Polignac number, because 1057996823 - 2²⁴ = 1041219607 is a prime.

It is a super-2 number, since 2×1057996823² = 2238714554956186658, 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 (1057996829) 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, 40692173 + ... + 40692198.

It is an arithmetic number, because the mean of its divisors is an integer number (284845302).

Almost surely, 2^1057996823 is an apocalyptic number.

1057996823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1057996823 is a deficient number, since it is larger than the sum of its proper divisors (81384385).

1057996823 is an equidigital number, since it uses as much as digits as its factorization.

1057996823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81384384.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 1057996823 is about 32526.8630980610. The cubic root of 1057996823 is about 1018.9701328257.

The spelling of 1057996823 in words is "one billion, fifty-seven million, nine hundred ninety-six thousand, eight hundred twenty-three".