12037813 has 4 divisors (see below), whose sum is σ = 12452940. Its totient is φ = 11622688.

The previous prime is 12037799. The next prime is 12037867. The reversal of 12037813 is 31873021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31873021 = 37 ⋅861433.

It can be written as a sum of positive squares in 2 ways, for example, as 10125124 + 1912689 = 3182^2 + 1383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12037813 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 (12038813) 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, 207520 + ... + 207577.

It is an arithmetic number, because the mean of its divisors is an integer number (3113235).

Almost surely, 2^12037813 is an apocalyptic number.

It is an amenable number.

12037813 is a deficient number, since it is larger than the sum of its proper divisors (415127).

12037813 is an equidigital number, since it uses as much as digits as its factorization.

12037813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415126.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12037813 is about 3469.5551588064. Note that the first 3 decimals coincide. The cubic root of 12037813 is about 229.1830690335.

The spelling of 12037813 in words is "twelve million, thirty-seven thousand, eight hundred thirteen".