1872513013 has 4 divisors (see below), whose sum is σ = 2140014880. Its totient is φ = 1605011148.

The previous prime is 1872512903. The next prime is 1872513017. The reversal of 1872513013 is 3103152781.

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.

It is a cyclic number.

It is not a de Polignac number, because 1872513013 - 2²¹ = 1870415861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1872513017) 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, 133750923 + ... + 133750936.

It is an arithmetic number, because the mean of its divisors is an integer number (535003720).

Almost surely, 2^1872513013 is an apocalyptic number.

It is an amenable number.

1872513013 is a deficient number, since it is larger than the sum of its proper divisors (267501867).

1872513013 is an equidigital number, since it uses as much as digits as its factorization.

1872513013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267501866.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1872513013 is about 43272.5434080318. The cubic root of 1872513013 is about 1232.5606015074.

Adding to 1872513013 its reverse (3103152781), we get a palindrome (4975665794).

The spelling of 1872513013 in words is "one billion, eight hundred seventy-two million, five hundred thirteen thousand, thirteen".