13690237 has 4 divisors (see below), whose sum is σ = 14934816. Its totient is φ = 12445660.

The previous prime is 13690213. The next prime is 13690277. The reversal of 13690237 is 73209631.

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 13690237 - 2⁷ = 13690109 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13690199 and 13690208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13690277) 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, 622273 + ... + 622294.

It is an arithmetic number, because the mean of its divisors is an integer number (3733704).

Almost surely, 2^13690237 is an apocalyptic number.

It is an amenable number.

13690237 is a deficient number, since it is larger than the sum of its proper divisors (1244579).

13690237 is a wasteful number, since it uses less digits than its factorization.

13690237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244578.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 13690237 is about 3700.0320268884. The cubic root of 13690237 is about 239.2233983163.

Adding to 13690237 its reverse (73209631), we get a palindrome (86899868).

The spelling of 13690237 in words is "thirteen million, six hundred ninety thousand, two hundred thirty-seven".