1056347643 has 8 divisors (see below), whose sum is σ = 1516806928. Its totient is φ = 650060064.

The previous prime is 1056347639. The next prime is 1056347671. The reversal of 1056347643 is 3467436501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1056347643 - 2² = 1056347639 is a prime.

It is a super-2 number, since 2×1056347643² = 2231740685743310898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 27085837 = 1056347643 / (1 + 0 + 5 + 6 + 3 + 4 + 7 + 6 + 4 + 3).

It is not an unprimeable number, because it can be changed into a prime (1056347603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13542880 + ... + 13542957.

It is an arithmetic number, because the mean of its divisors is an integer number (189600866).

Almost surely, 2^1056347643 is an apocalyptic number.

1056347643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1056347643 is a deficient number, since it is larger than the sum of its proper divisors (460459285).

1056347643 is a wasteful number, since it uses less digits than its factorization.

1056347643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27085853.

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 1056347643 is about 32501.5021652846. The cubic root of 1056347643 is about 1018.4404087786.

The spelling of 1056347643 in words is "one billion, fifty-six million, three hundred forty-seven thousand, six hundred forty-three".