13780699 has 4 divisors (see below), whose sum is σ = 13792680. Its totient is φ = 13768720.

The previous prime is 13780651. The next prime is 13780733. The reversal of 13780699 is 99608731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99608731 = 461 ⋅216071.

It is a cyclic number.

It is not a de Polignac number, because 13780699 - 2¹⁷ = 13649627 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 8.

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 3 ways as a sum of consecutive naturals, for example, 4057 + ... + 6634.

It is an arithmetic number, because the mean of its divisors is an integer number (3448170).

Almost surely, 2^13780699 is an apocalyptic number.

13780699 is a deficient number, since it is larger than the sum of its proper divisors (11981).

13780699 is a wasteful number, since it uses less digits than its factorization.

13780699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11980.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 13780699 is about 3712.2363879473. The cubic root of 13780699 is about 239.7491534172.

The spelling of 13780699 in words is "thirteen million, seven hundred eighty thousand, six hundred ninety-nine".