1129651643 has 2 divisors, whose sum is σ = 1129651644. Its totient is φ = 1129651642.

The previous prime is 1129651613. The next prime is 1129651681. The reversal of 1129651643 is 3461569211.

It is an a-pointer prime, because the next prime (1129651681) can be obtained adding 1129651643 to its sum of digits (38).

It is a weak prime.

It is an emirp because it is prime and its reverse (3461569211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1129651643 is a prime.

It is a super-2 number, since 2×1129651643² = 2552225669065198898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1129651597 and 1129651606.

It is not a weakly prime, because it can be changed into another prime (1129651613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564825821 + 564825822.

It is an arithmetic number, because the mean of its divisors is an integer number (564825822).

Almost surely, 2^1129651643 is an apocalyptic number.

1129651643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1129651643 is an equidigital number, since it uses as much as digits as its factorization.

1129651643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 1129651643 is about 33610.2907306676. The cubic root of 1129651643 is about 1041.4733933159.

The spelling of 1129651643 in words is "one billion, one hundred twenty-nine million, six hundred fifty-one thousand, six hundred forty-three".