13207997 has 12 divisors (see below), whose sum is σ = 15374268. Its totient is φ = 11299200.

The previous prime is 13207993. The next prime is 13208023. The reversal of 13207997 is 79970231.

It can be written as a sum of positive squares in 2 ways, for example, as 7027801 + 6180196 = 2651^2 + 2486^2 .

It is not a de Polignac number, because 13207997 - 2² = 13207993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13207997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13207991) 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 11 ways as a sum of consecutive naturals, for example, 1154 + ... + 5267.

It is an arithmetic number, because the mean of its divisors is an integer number (1281189).

Almost surely, 2^13207997 is an apocalyptic number.

13207997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13207997 is a deficient number, since it is larger than the sum of its proper divisors (2166271).

13207997 is a wasteful number, since it uses less digits than its factorization.

13207997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460 (or 6449 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 13207997 is about 3634.2808091836. The cubic root of 13207997 is about 236.3808666254.

The spelling of 13207997 in words is "thirteen million, two hundred seven thousand, nine hundred ninety-seven".