13870457 has 2 divisors, whose sum is σ = 13870458. Its totient is φ = 13870456.

The previous prime is 13870427. The next prime is 13870459. The reversal of 13870457 is 75407831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13697401 + 173056 = 3701^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 13870457 - 2⁸ = 13870201 is a prime.

Together with 13870459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13870459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6935228 + 6935229.

It is an arithmetic number, because the mean of its divisors is an integer number (6935229).

Almost surely, 2^13870457 is an apocalyptic number.

It is an amenable number.

13870457 is a deficient number, since it is larger than the sum of its proper divisors (1).

13870457 is an equidigital number, since it uses as much as digits as its factorization.

13870457 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 13870457 is about 3724.3062441212. The cubic root of 13870457 is about 240.2685477763.

The spelling of 13870457 in words is "thirteen million, eight hundred seventy thousand, four hundred fifty-seven".