13671857 has 2 divisors, whose sum is σ = 13671858. Its totient is φ = 13671856.

The previous prime is 13671829. The next prime is 13671863. The reversal of 13671857 is 75817631.

13671857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12503296 + 1168561 = 3536^2 + 1081^2 .

It is a cyclic number.

It is not a de Polignac number, because 13671857 - 2¹² = 13667761 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13671857.

It is not a weakly prime, because it can be changed into another prime (13671257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6835928 + 6835929.

It is an arithmetic number, because the mean of its divisors is an integer number (6835929).

Almost surely, 2^13671857 is an apocalyptic number.

It is an amenable number.

13671857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13671857 is an equidigital number, since it uses as much as digits as its factorization.

13671857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 13671857 is about 3697.5474303922. The cubic root of 13671857 is about 239.1162929086.

The spelling of 13671857 in words is "thirteen million, six hundred seventy-one thousand, eight hundred fifty-seven".