13929493 has 2 divisors, whose sum is σ = 13929494. Its totient is φ = 13929492.

The previous prime is 13929481. The next prime is 13929497. The reversal of 13929493 is 39492931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 1270129 = 3558^2 + 1127^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13929493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13929497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6964746 + 6964747.

It is an arithmetic number, because the mean of its divisors is an integer number (6964747).

Almost surely, 2^13929493 is an apocalyptic number.

It is an amenable number.

13929493 is a deficient number, since it is larger than the sum of its proper divisors (1).

13929493 is an equidigital number, since it uses as much as digits as its factorization.

13929493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 40.

The square root of 13929493 is about 3732.2235999468. The cubic root of 13929493 is about 240.6089455303.

The spelling of 13929493 in words is "thirteen million, nine hundred twenty-nine thousand, four hundred ninety-three".