13628131 has 4 divisors (see below), whose sum is σ = 14867064. Its totient is φ = 12389200.

The previous prime is 13628129. The next prime is 13628137. The reversal of 13628131 is 13182631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13628131 - 2¹ = 13628129 is a prime.

It is a super-2 number, since 2×13628131² = 371451909106322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13628096 and 13628105.

It is not an unprimeable number, because it can be changed into a prime (13628137) 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, 619450 + ... + 619471.

It is an arithmetic number, because the mean of its divisors is an integer number (3716766).

Almost surely, 2^13628131 is an apocalyptic number.

13628131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13628131 is a deficient number, since it is larger than the sum of its proper divisors (1238933).

13628131 is a wasteful number, since it uses less digits than its factorization.

13628131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238932.

The product of its digits is 864, while the sum is 25.

The square root of 13628131 is about 3691.6298568518. The cubic root of 13628131 is about 238.8611028636.

The spelling of 13628131 in words is "thirteen million, six hundred twenty-eight thousand, one hundred thirty-one".