13402993 has 2 divisors, whose sum is σ = 13402994.
Its totient is φ = 13402992.
The previous prime is 13402979. The next prime is 13403041. The reversal of 13402993 is 39920431.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 13198689 + 204304 = 3633^2 + 452^2
It is a cyclic number.
It is not a de Polignac number, because 13402993 - 221 = 11305841 is a prime.
It is not a weakly prime, because it can be changed into another prime (13402913) 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 as a sum of consecutive naturals, namely, 6701496 + 6701497.
It is an arithmetic number, because the mean of its divisors is an integer number (6701497).
Almost surely, 213402993 is an apocalyptic number.
It is an amenable number.
13402993 is a deficient number, since it is larger than the sum of its proper divisors (1).
13402993 is an equidigital number, since it uses as much as digits as its factorization.
13402993 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 5832, while the sum is 31.
The square root of 13402993 is about 3661.0098333657.
The cubic root of 13402993 is about 237.5384565612.
The spelling of 13402993 in words is "thirteen million, four hundred two thousand, nine hundred ninety-three".