13628621 has 2 divisors, whose sum is σ = 13628622. Its totient is φ = 13628620.

The previous prime is 13628609. The next prime is 13628633. The reversal of 13628621 is 12682631.

It is a balanced prime because it is at equal distance from previous prime (13628609) and next prime (13628633).

It can be written as a sum of positive squares in only one way, i.e., 13586596 + 42025 = 3686^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 13628621 - 2⁶ = 13628557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13628221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6814310 + 6814311.

It is an arithmetic number, because the mean of its divisors is an integer number (6814311).

Almost surely, 2^13628621 is an apocalyptic number.

It is an amenable number.

13628621 is a deficient number, since it is larger than the sum of its proper divisors (1).

13628621 is an equidigital number, since it uses as much as digits as its factorization.

13628621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 13628621 is about 3691.6962226055. The cubic root of 13628621 is about 238.8639655828.

The spelling of 13628621 in words is "thirteen million, six hundred twenty-eight thousand, six hundred twenty-one".