1300000043 has 6 divisors (see below), whose sum is σ = 1358979804. Its totient is φ = 1243477796.

The previous prime is 1300000021. The next prime is 1300000049. The reversal of 1300000043 is 3400000031.

It is a de Polignac number, because none of the positive numbers 2^k-1300000043 is a prime.

It is a super-3 number, since 3×1300000043³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1300000049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1228205 + ... + 1229262.

It is an arithmetic number, because the mean of its divisors is an integer number (226496634).

Almost surely, 2^1300000043 is an apocalyptic number.

1300000043 is a deficient number, since it is larger than the sum of its proper divisors (58979761).

1300000043 is an equidigital number, since it uses as much as digits as its factorization.

1300000043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457513 (or 2457490 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 1300000043 is about 36055.5133509426. The cubic root of 1300000043 is about 1091.3928950944.

Adding to 1300000043 its reverse (3400000031), we get a palindrome (4700000074).

The spelling of 1300000043 in words is "one billion, three hundred million, forty-three", and thus it is an aban number.