13400043 has 16 divisors (see below), whose sum is σ = 18475776. Its totient is φ = 8634080.

The previous prime is 13400041. The next prime is 13400077. The reversal of 13400043 is 34000431.

It is a cyclic number.

It is not a de Polignac number, because 13400043 - 2¹ = 13400041 is a prime.

It is a super-2 number, since 2×13400043² = 359122304803698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13399995 and 13400031.

It is not an unprimeable number, because it can be changed into a prime (13400041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10696 + ... + 11882.

It is an arithmetic number, because the mean of its divisors is an integer number (1154736).

Almost surely, 2^13400043 is an apocalyptic number.

13400043 is a deficient number, since it is larger than the sum of its proper divisors (5075733).

13400043 is a wasteful number, since it uses less digits than its factorization.

13400043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 13400043 is about 3660.6069168923. The cubic root of 13400043 is about 237.5210278704.

Adding to 13400043 its reverse (34000431), we get a palindrome (47400474).

The spelling of 13400043 in words is "thirteen million, four hundred thousand, forty-three".