13628761 has 4 divisors (see below), whose sum is σ = 13636224. Its totient is φ = 13621300.

The previous prime is 13628759. The next prime is 13628773. The reversal of 13628761 is 16782631.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16782631 = 857 ⋅19583.

It is a cyclic number.

It is not a de Polignac number, because 13628761 - 2¹ = 13628759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13628711) 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, 1056 + ... + 5326.

It is an arithmetic number, because the mean of its divisors is an integer number (3409056).

Almost surely, 2^13628761 is an apocalyptic number.

It is an amenable number.

13628761 is a deficient number, since it is larger than the sum of its proper divisors (7463).

13628761 is an equidigital number, since it uses as much as digits as its factorization.

13628761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7462.

The product of its digits is 12096, while the sum is 34.

The square root of 13628761 is about 3691.7151840303. The cubic root of 13628761 is about 238.8647834900.

The spelling of 13628761 in words is "thirteen million, six hundred twenty-eight thousand, seven hundred sixty-one".