1300000001 has 4 divisors (see below), whose sum is σ = 1300077504. Its totient is φ = 1299922500.

The previous prime is 1299999983. The next prime is 1300000003. The reversal of 1300000001 is 1000000031.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1000000031 = 173 ⋅5780347.

It is a cyclic number.

It is not a de Polignac number, because 1300000001 - 2¹⁴ = 1299983617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1300000003) 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, 1925 + ... + 51026.

It is an arithmetic number, because the mean of its divisors is an integer number (325019376).

Almost surely, 2^1300000001 is an apocalyptic number.

It is an amenable number.

1300000001 is a deficient number, since it is larger than the sum of its proper divisors (77503).

1300000001 is an equidigital number, since it uses as much as digits as its factorization.

1300000001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77502.

The product of its (nonzero) digits is 3, while the sum is 5.

The square root of 1300000001 is about 36055.5127685074. The cubic root of 1300000001 is about 1091.3928833410.

Adding to 1300000001 its reverse (1000000031), we get a palindrome (2300000032).

The spelling of 1300000001 in words is "one billion, three hundred million, one", and thus it is an aban number.