38943493 has 2 divisors, whose sum is σ = 38943494. Its totient is φ = 38943492.

The previous prime is 38943449. The next prime is 38943523. The reversal of 38943493 is 39434983.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20948929 + 17994564 = 4577^2 + 4242^2 .

It is a cyclic number.

It is not a de Polignac number, because 38943493 - 2¹³ = 38935301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38940493) 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, 19471746 + 19471747.

It is an arithmetic number, because the mean of its divisors is an integer number (19471747).

Almost surely, 2^38943493 is an apocalyptic number.

It is an amenable number.

38943493 is a deficient number, since it is larger than the sum of its proper divisors (1).

38943493 is an equidigital number, since it uses as much as digits as its factorization.

38943493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 43.

The square root of 38943493 is about 6240.4721776481. The cubic root of 38943493 is about 338.9572812168.

The spelling of 38943493 in words is "thirty-eight million, nine hundred forty-three thousand, four hundred ninety-three".