13347997 has 8 divisors (see below), whose sum is σ = 14646744. Its totient is φ = 12088128.

The previous prime is 13347991. The next prime is 13348003. The reversal of 13347997 is 79974331.

It is an interprime number because it is at equal distance from previous prime (13347991) and next prime (13348003).

It can be written as a sum of positive squares in 4 ways, for example, as 538756 + 12809241 = 734^2 + 3579^2 .

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

It is not a de Polignac number, because 13347997 - 2²³ = 4959389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13347991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8998 + ... + 10375.

It is an arithmetic number, because the mean of its divisors is an integer number (1830843).

Almost surely, 2^13347997 is an apocalyptic number.

It is an amenable number.

13347997 is a deficient number, since it is larger than the sum of its proper divisors (1298747).

13347997 is a wasteful number, since it uses less digits than its factorization.

13347997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19439.

The product of its digits is 142884, while the sum is 43.

The square root of 13347997 is about 3653.4910701957. The cubic root of 13347997 is about 237.2131169478.

The spelling of 13347997 in words is "thirteen million, three hundred forty-seven thousand, nine hundred ninety-seven".