1002012313 has 4 divisors (see below), whose sum is σ = 1002286180. Its totient is φ = 1001738448.

The previous prime is 1002012311. The next prime is 1002012337. The reversal of 1002012313 is 3132102001.

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 114746944 + 887265369 = 10712^2 + 29787^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002012313 - 2¹ = 1002012311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1002012293 and 1002012302.

It is not an unprimeable number, because it can be changed into a prime (1002012311) 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, 131370 + ... + 138787.

It is an arithmetic number, because the mean of its divisors is an integer number (250571545).

Almost surely, 2^1002012313 is an apocalyptic number.

It is an amenable number.

1002012313 is a deficient number, since it is larger than the sum of its proper divisors (273867).

1002012313 is an equidigital number, since it uses as much as digits as its factorization.

1002012313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273866.

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

The square root of 1002012313 is about 31654.5780733214. The cubic root of 1002012313 is about 1000.6703215686.

Adding to 1002012313 its reverse (3132102001), we get a palindrome (4134114314).

The spelling of 1002012313 in words is "one billion, two million, twelve thousand, three hundred thirteen".