13400971 has 2 divisors, whose sum is σ = 13400972. Its totient is φ = 13400970.

The previous prime is 13400963. The next prime is 13401041. The reversal of 13400971 is 17900431.

It is a weak prime.

It is an emirp because it is prime and its reverse (17900431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13400971 - 2³ = 13400963 is a prime.

It is not a weakly prime, because it can be changed into another prime (13400921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6700485 + 6700486.

It is an arithmetic number, because the mean of its divisors is an integer number (6700486).

Almost surely, 2^13400971 is an apocalyptic number.

13400971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13400971 is an equidigital number, since it uses as much as digits as its factorization.

13400971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 13400971 is about 3660.7336696351. The cubic root of 13400971 is about 237.5265107987.

The spelling of 13400971 in words is "thirteen million, four hundred thousand, nine hundred seventy-one".