13404427 has 2 divisors, whose sum is σ = 13404428. Its totient is φ = 13404426.

The previous prime is 13404407. The next prime is 13404451. The reversal of 13404427 is 72440431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13404427 - 2⁷ = 13404299 is a prime.

It is not a weakly prime, because it can be changed into another prime (13404407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702213 + 6702214.

It is an arithmetic number, because the mean of its divisors is an integer number (6702214).

Almost surely, 2^13404427 is an apocalyptic number.

13404427 is a deficient number, since it is larger than the sum of its proper divisors (1).

13404427 is an equidigital number, since it uses as much as digits as its factorization.

13404427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 13404427 is about 3661.2056757303. The cubic root of 13404427 is about 237.5469277537.

Adding to 13404427 its reverse (72440431), we get a palindrome (85844858).

It can be divided in two parts, 13404 and 427, that added together give a palindrome (13831).

The spelling of 13404427 in words is "thirteen million, four hundred four thousand, four hundred twenty-seven".