13173997 has 12 divisors (see below), whose sum is σ = 14328468. Its totient is φ = 12070400.

The previous prime is 13173991. The next prime is 13174001. The reversal of 13173997 is 79937131.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 3118756 + 10055241 = 1766^2 + 3171^2 .

It is not a de Polignac number, because 13173997 - 2¹⁹ = 12649709 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 (13173991) 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 11 ways as a sum of consecutive naturals, for example, 28347 + ... + 28807.

It is an arithmetic number, because the mean of its divisors is an integer number (1194039).

Almost surely, 2^13173997 is an apocalyptic number.

13173997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13173997 is a deficient number, since it is larger than the sum of its proper divisors (1154471).

13173997 is an equidigital number, since it uses as much as digits as its factorization.

13173997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 519 counting only the distinct ones).

The product of its digits is 35721, while the sum is 40.

The square root of 13173997 is about 3629.6001157152. The cubic root of 13173997 is about 236.1778619463.

The spelling of 13173997 in words is "thirteen million, one hundred seventy-three thousand, nine hundred ninety-seven".