1056823129 has 2 divisors, whose sum is σ = 1056823130. Its totient is φ = 1056823128.

The previous prime is 1056823099. The next prime is 1056823181. The reversal of 1056823129 is 9213286501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 938013129 + 118810000 = 30627^2 + 10900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056823129 - 2¹¹ = 1056821081 is a prime.

It is a super-2 number, since 2×1056823129² = 2233750251978701282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056823429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528411564 + 528411565.

It is an arithmetic number, because the mean of its divisors is an integer number (528411565).

Almost surely, 2^1056823129 is an apocalyptic number.

It is an amenable number.

1056823129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056823129 is an equidigital number, since it uses as much as digits as its factorization.

1056823129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 1056823129 is about 32508.8161734629. The cubic root of 1056823129 is about 1018.5931935553.

It can be divided in two parts, 105682 and 3129, that added together give a triangular number (108811 = T₄₆₆).

The spelling of 1056823129 in words is "one billion, fifty-six million, eight hundred twenty-three thousand, one hundred twenty-nine".