13780147 has 4 divisors (see below), whose sum is σ = 13791096. Its totient is φ = 13769200.

The previous prime is 13780127. The next prime is 13780163. The reversal of 13780147 is 74108731.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13780147 - 2¹¹ = 13778099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13780127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3298 + ... + 6199.

It is an arithmetic number, because the mean of its divisors is an integer number (3447774).

Almost surely, 2^13780147 is an apocalyptic number.

13780147 is a deficient number, since it is larger than the sum of its proper divisors (10949).

13780147 is an equidigital number, since it uses as much as digits as its factorization.

13780147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10948.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 13780147 is about 3712.1620384892. The cubic root of 13780147 is about 239.7459522419.

Adding to 13780147 its reverse (74108731), we get a palindrome (87888878).

The spelling of 13780147 in words is "thirteen million, seven hundred eighty thousand, one hundred forty-seven".