13643401 has 8 divisors (see below), whose sum is σ = 14501160. Its totient is φ = 12836224.

The previous prime is 13643353. The next prime is 13643407. The reversal of 13643401 is 10434631.

It can be written as a sum of positive squares in 4 ways, for example, as 855625 + 12787776 = 925^2 + 3576^2 .

It is not a de Polignac number, because 13643401 - 2¹⁵ = 13610633 is a prime.

It is a super-2 number, since 2×13643401² = 372284781693602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13643407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3525 + ... + 6301.

It is an arithmetic number, because the mean of its divisors is an integer number (1812645).

Almost surely, 2^13643401 is an apocalyptic number.

It is an amenable number.

13643401 is a deficient number, since it is larger than the sum of its proper divisors (857759).

13643401 is an frugal number, since it uses more digits than its factorization.

13643401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2828 (or 2794 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 13643401 is about 3693.6974700156. The cubic root of 13643401 is about 238.9502823119.

The spelling of 13643401 in words is "thirteen million, six hundred forty-three thousand, four hundred one".