13501993 has 2 divisors, whose sum is σ = 13501994. Its totient is φ = 13501992.

The previous prime is 13501987. The next prime is 13502011. The reversal of 13501993 is 39910531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12054784 + 1447209 = 3472^2 + 1203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13501993 is a prime.

It is not a weakly prime, because it can be changed into another prime (13501963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6750996 + 6750997.

It is an arithmetic number, because the mean of its divisors is an integer number (6750997).

Almost surely, 2^13501993 is an apocalyptic number.

It is an amenable number.

13501993 is a deficient number, since it is larger than the sum of its proper divisors (1).

13501993 is an equidigital number, since it uses as much as digits as its factorization.

13501993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 31.

The square root of 13501993 is about 3674.5058171134. The cubic root of 13501993 is about 238.1218745901.

The spelling of 13501993 in words is "thirteen million, five hundred one thousand, nine hundred ninety-three".