1043400013 has 4 divisors (see below), whose sum is σ = 1043811900. Its totient is φ = 1042988128.

The previous prime is 1043399989. The next prime is 1043400053. The reversal of 1043400013 is 3100043401.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 825010729 + 218389284 = 28723^2 + 14778^2 .

It is a cyclic number.

It is not a de Polignac number, because 1043400013 - 2⁹ = 1043399501 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1043400013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043400053) 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, 202120 + ... + 207217.

It is an arithmetic number, because the mean of its divisors is an integer number (260952975).

Almost surely, 2^1043400013 is an apocalyptic number.

It is an amenable number.

1043400013 is a deficient number, since it is larger than the sum of its proper divisors (411887).

1043400013 is an equidigital number, since it uses as much as digits as its factorization.

1043400013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411886.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1043400013 is about 32301.7029427242. The cubic root of 1043400013 is about 1014.2622910103.

Adding to 1043400013 its reverse (3100043401), we get a palindrome (4143443414).

The spelling of 1043400013 in words is "one billion, forty-three million, four hundred thousand, thirteen".