13788197 has 4 divisors (see below), whose sum is σ = 13801740. Its totient is φ = 13774656.

The previous prime is 13788179. The next prime is 13788199. The reversal of 13788197 is 79188731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 835396 + 12952801 = 914^2 + 3599^2 .

It is a cyclic number.

It is not a de Polignac number, because 13788197 - 2⁸ = 13787941 is a prime.

It is a super-2 number, since 2×13788197² = 380228753021618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13788199) 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, 5108 + ... + 7325.

It is an arithmetic number, because the mean of its divisors is an integer number (3450435).

Almost surely, 2^13788197 is an apocalyptic number.

It is an amenable number.

13788197 is a deficient number, since it is larger than the sum of its proper divisors (13543).

13788197 is a wasteful number, since it uses less digits than its factorization.

13788197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13542.

The product of its digits is 84672, while the sum is 44.

The square root of 13788197 is about 3713.2461539736. The cubic root of 13788197 is about 239.7926275841.

The spelling of 13788197 in words is "thirteen million, seven hundred eighty-eight thousand, one hundred ninety-seven".