13113437 has 4 divisors (see below), whose sum is σ = 13125276. Its totient is φ = 13101600.

The previous prime is 13113431. The next prime is 13113467. The reversal of 13113437 is 73431131.

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 10588516 + 2524921 = 3254^2 + 1589^2 .

It is a cyclic number.

It is not a de Polignac number, because 13113437 - 2⁸ = 13113181 is a prime.

It is a super-3 number, since 3×13113437³ (a number of 22 digits) contains 333 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 (13113431) 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, 4064 + ... + 6537.

It is an arithmetic number, because the mean of its divisors is an integer number (3281319).

Almost surely, 2^13113437 is an apocalyptic number.

It is an amenable number.

13113437 is a deficient number, since it is larger than the sum of its proper divisors (11839).

13113437 is a wasteful number, since it uses less digits than its factorization.

13113437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11838.

The product of its digits is 756, while the sum is 23.

The square root of 13113437 is about 3621.2479892987. The cubic root of 13113437 is about 235.8154079391.

Adding to 13113437 its reverse (73431131), we get a palindrome (86544568).

The spelling of 13113437 in words is "thirteen million, one hundred thirteen thousand, four hundred thirty-seven".