13071973 has 4 divisors (see below), whose sum is σ = 13318668. Its totient is φ = 12825280.

The previous prime is 13071967. The next prime is 13071979. The reversal of 13071973 is 37917031.

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

It is an interprime number because it is at equal distance from previous prime (13071967) and next prime (13071979).

It can be written as a sum of positive squares in 2 ways, for example, as 11710084 + 1361889 = 3422^2 + 1167^2 .

It is a cyclic number.

It is not a de Polignac number, because 13071973 - 2⁵ = 13071941 is a prime.

It is a super-3 number, since 3×13071973³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13071979) 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, 123268 + ... + 123373.

It is an arithmetic number, because the mean of its divisors is an integer number (3329667).

Almost surely, 2^13071973 is an apocalyptic number.

It is an amenable number.

13071973 is a deficient number, since it is larger than the sum of its proper divisors (246695).

13071973 is an equidigital number, since it uses as much as digits as its factorization.

13071973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246694.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 13071973 is about 3615.5183584100. The cubic root of 13071973 is about 235.5666001984.

The spelling of 13071973 in words is "thirteen million, seventy-one thousand, nine hundred seventy-three".