13780859 has 4 divisors (see below), whose sum is σ = 13803000. Its totient is φ = 13758720.

The previous prime is 13780847. The next prime is 13780873. The reversal of 13780859 is 95808731.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95808731 = 23 ⋅4165597.

It is a cyclic number.

It is not a de Polignac number, because 13780859 - 2⁴ = 13780843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13780759) 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, 10109 + ... + 11390.

It is an arithmetic number, because the mean of its divisors is an integer number (3450750).

Almost surely, 2^13780859 is an apocalyptic number.

13780859 is a deficient number, since it is larger than the sum of its proper divisors (22141).

13780859 is an equidigital number, since it uses as much as digits as its factorization.

13780859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22140.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 13780859 is about 3712.2579382365. The cubic root of 13780859 is about 239.7500812782.

The spelling of 13780859 in words is "thirteen million, seven hundred eighty thousand, eight hundred fifty-nine".