13857407 has 2 divisors, whose sum is σ = 13857408. Its totient is φ = 13857406.

The previous prime is 13857401. The next prime is 13857427. The reversal of 13857407 is 70475831.

It is a weak prime.

It is an emirp because it is prime and its reverse (70475831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13857407 - 2⁶ = 13857343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13857401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928703 + 6928704.

It is an arithmetic number, because the mean of its divisors is an integer number (6928704).

Almost surely, 2^13857407 is an apocalyptic number.

13857407 is a deficient number, since it is larger than the sum of its proper divisors (1).

13857407 is an equidigital number, since it uses as much as digits as its factorization.

13857407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 13857407 is about 3722.5538276834. The cubic root of 13857407 is about 240.1931720236.

The spelling of 13857407 in words is "thirteen million, eight hundred fifty-seven thousand, four hundred seven".