1000143013 has 4 divisors (see below), whose sum is σ = 1000221760. Its totient is φ = 1000064268.

The previous prime is 1000142959. The next prime is 1000143029. The reversal of 1000143013 is 3103410001.

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: 3103410001 = 1087 ⋅2855023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000143013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000142984 and 1000143002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000143083) 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, 15495 + ... + 47332.

It is an arithmetic number, because the mean of its divisors is an integer number (250055440).

Almost surely, 2^1000143013 is an apocalyptic number.

It is an amenable number.

1000143013 is a deficient number, since it is larger than the sum of its proper divisors (78747).

1000143013 is an equidigital number, since it uses as much as digits as its factorization.

1000143013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78746.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1000143013 is about 31625.0377549182. The cubic root of 1000143013 is about 1000.0476687277.

Adding to 1000143013 its reverse (3103410001), we get a palindrome (4103553014).

The spelling of 1000143013 in words is "one billion, one hundred forty-three thousand, thirteen".