1056647729 has 4 divisors (see below), whose sum is σ = 1081220976. Its totient is φ = 1032074484.

The previous prime is 1056647719. The next prime is 1056647737. The reversal of 1056647729 is 9277466501.

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: 9277466501 = 181 ⋅51256721.

It is a cyclic number.

It is not a de Polignac number, because 1056647729 - 2¹⁶ = 1056582193 is a prime.

It is a super-2 number, since 2×1056647729² = 2233008846401714882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056647719) 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, 12286559 + ... + 12286644.

It is an arithmetic number, because the mean of its divisors is an integer number (270305244).

Almost surely, 2^1056647729 is an apocalyptic number.

It is an amenable number.

1056647729 is a deficient number, since it is larger than the sum of its proper divisors (24573247).

1056647729 is an equidigital number, since it uses as much as digits as its factorization.

1056647729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24573246.

The product of its (nonzero) digits is 635040, while the sum is 47.

The square root of 1056647729 is about 32506.1183317849. The cubic root of 1056647729 is about 1018.5368387670.

The spelling of 1056647729 in words is "one billion, fifty-six million, six hundred forty-seven thousand, seven hundred twenty-nine".