13780669 has 8 divisors (see below), whose sum is σ = 15805440. Its totient is φ = 11769936.

The previous prime is 13780651. The next prime is 13780733. The reversal of 13780669 is 96608731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13780669 is a prime.

It is a super-2 number, since 2×13780669² = 379813676175122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1309 + ... + 5410.

It is an arithmetic number, because the mean of its divisors is an integer number (1975680).

Almost surely, 2^13780669 is an apocalyptic number.

It is an amenable number.

13780669 is a deficient number, since it is larger than the sum of its proper divisors (2024771).

13780669 is an equidigital number, since it uses as much as digits as its factorization.

13780669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7019.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 13780669 is about 3712.2323472541. The cubic root of 13780669 is about 239.7489794425.

The spelling of 13780669 in words is "thirteen million, seven hundred eighty thousand, six hundred sixty-nine".