1310003999 has 4 divisors (see below), whose sum is σ = 1310114064. Its totient is φ = 1309893936.

The previous prime is 1310003993. The next prime is 1310004011. The reversal of 1310003999 is 9993000131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1310003999 - 2⁸ = 1310003743 is a prime.

It is a super-2 number, since 2×1310003999² = 3432220954791984002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310003993) 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, 34667 + ... + 61820.

It is an arithmetic number, because the mean of its divisors is an integer number (327528516).

Almost surely, 2^1310003999 is an apocalyptic number.

1310003999 is a deficient number, since it is larger than the sum of its proper divisors (110065).

1310003999 is an equidigital number, since it uses as much as digits as its factorization.

1310003999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110064.

The product of its (nonzero) digits is 6561, while the sum is 35.

The square root of 1310003999 is about 36193.9773857475. The cubic root of 1310003999 is about 1094.1852947574.

The spelling of 1310003999 in words is "one billion, three hundred ten million, three thousand, nine hundred ninety-nine".