13491001 has 2 divisors, whose sum is σ = 13491002. Its totient is φ = 13491000.

The previous prime is 13490993. The next prime is 13491011. The reversal of 13491001 is 10019431.

It is a happy number.

It is the 1500-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10086976 + 3404025 = 3176^2 + 1845^2 .

It is an emirp because it is prime and its reverse (10019431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13491001 - 2³ = 13490993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13491001.

It is not a weakly prime, because it can be changed into another prime (13491011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6745500 + 6745501.

It is an arithmetic number, because the mean of its divisors is an integer number (6745501).

Almost surely, 2^13491001 is an apocalyptic number.

It is an amenable number.

13491001 is a deficient number, since it is larger than the sum of its proper divisors (1).

13491001 is an equidigital number, since it uses as much as digits as its factorization.

13491001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 13491001 is about 3673.0098012393. The cubic root of 13491001 is about 238.0572385458.

The spelling of 13491001 in words is "thirteen million, four hundred ninety-one thousand, one".