13531493 has 2 divisors, whose sum is σ = 13531494. Its totient is φ = 13531492.

The previous prime is 13531489. The next prime is 13531501. The reversal of 13531493 is 39413531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12517444 + 1014049 = 3538^2 + 1007^2 .

It is a cyclic number.

It is not a de Polignac number, because 13531493 - 2² = 13531489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13531433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765746 + 6765747.

It is an arithmetic number, because the mean of its divisors is an integer number (6765747).

Almost surely, 2^13531493 is an apocalyptic number.

It is an amenable number.

13531493 is a deficient number, since it is larger than the sum of its proper divisors (1).

13531493 is an equidigital number, since it uses as much as digits as its factorization.

13531493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4860, while the sum is 29.

The square root of 13531493 is about 3678.5177721468. The cubic root of 13531493 is about 238.2951696382.

The spelling of 13531493 in words is "thirteen million, five hundred thirty-one thousand, four hundred ninety-three".