38493947 has 2 divisors, whose sum is σ = 38493948. Its totient is φ = 38493946.

The previous prime is 38493937. The next prime is 38494009. The reversal of 38493947 is 74939483.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38493947 - 2⁶ = 38493883 is a prime.

It is not a weakly prime, because it can be changed into another prime (38493907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19246973 + 19246974.

It is an arithmetic number, because the mean of its divisors is an integer number (19246974).

Almost surely, 2^38493947 is an apocalyptic number.

38493947 is a deficient number, since it is larger than the sum of its proper divisors (1).

38493947 is an equidigital number, since it uses as much as digits as its factorization.

38493947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 38493947 is about 6204.3490391821. The cubic root of 38493947 is about 337.6479738873.

The spelling of 38493947 in words is "thirty-eight million, four hundred ninety-three thousand, nine hundred forty-seven".