13780497 has 4 divisors (see below), whose sum is σ = 18374000. Its totient is φ = 9186996.

The previous prime is 13780471. The next prime is 13780537. The reversal of 13780497 is 79408731.

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 not a de Polignac number, because 13780497 - 2⁶ = 13780433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13780457) 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, 2296747 + ... + 2296752.

It is an arithmetic number, because the mean of its divisors is an integer number (4593500).

Almost surely, 2^13780497 is an apocalyptic number.

It is an amenable number.

13780497 is a deficient number, since it is larger than the sum of its proper divisors (4593503).

13780497 is an equidigital number, since it uses as much as digits as its factorization.

13780497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4593502.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 13780497 is about 3712.2091805285. The cubic root of 13780497 is about 239.7479819826.

The spelling of 13780497 in words is "thirteen million, seven hundred eighty thousand, four hundred ninety-seven".