13730857 has 4 divisors (see below), whose sum is σ = 15692416. Its totient is φ = 11769300.

The previous prime is 13730851. The next prime is 13730867. The reversal of 13730857 is 75803731.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13730857 - 2⁷ = 13730729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13730851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980769 + ... + 980782.

It is an arithmetic number, because the mean of its divisors is an integer number (3923104).

Almost surely, 2^13730857 is an apocalyptic number.

It is an amenable number.

13730857 is a deficient number, since it is larger than the sum of its proper divisors (1961559).

13730857 is an equidigital number, since it uses as much as digits as its factorization.

13730857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961558.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 13730857 is about 3705.5171029156. The cubic root of 13730857 is about 239.4597628543.

The spelling of 13730857 in words is "thirteen million, seven hundred thirty thousand, eight hundred fifty-seven".