13401943 has 4 divisors (see below), whose sum is σ = 13602040. Its totient is φ = 13201848.

The previous prime is 13401937. The next prime is 13401989. The reversal of 13401943 is 34910431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34910431 = 911 ⋅38321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13401943 is a prime.

It is a super-2 number, since 2×13401943² = 359224152350498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13401043) 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, 99948 + ... + 100081.

It is an arithmetic number, because the mean of its divisors is an integer number (3400510).

Almost surely, 2^13401943 is an apocalyptic number.

13401943 is a deficient number, since it is larger than the sum of its proper divisors (200097).

13401943 is an equidigital number, since it uses as much as digits as its factorization.

13401943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200096.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13401943 is about 3660.8664275005. The cubic root of 13401943 is about 237.5322534221.

It can be divided in two parts, 13 and 401943, that added together give a square (401956 = 634²).

The spelling of 13401943 in words is "thirteen million, four hundred one thousand, nine hundred forty-three".