38947393 has 2 divisors, whose sum is σ = 38947394. Its totient is φ = 38947392.

The previous prime is 38947387. The next prime is 38947409. The reversal of 38947393 is 39374983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19998784 + 18948609 = 4472^2 + 4353^2 .

It is a cyclic number.

It is not a de Polignac number, because 38947393 - 2⁵ = 38947361 is a prime.

It is not a weakly prime, because it can be changed into another prime (38947373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19473696 + 19473697.

It is an arithmetic number, because the mean of its divisors is an integer number (19473697).

Almost surely, 2^38947393 is an apocalyptic number.

It is an amenable number.

38947393 is a deficient number, since it is larger than the sum of its proper divisors (1).

38947393 is an equidigital number, since it uses as much as digits as its factorization.

38947393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 46.

The square root of 38947393 is about 6240.7846461803. The cubic root of 38947393 is about 338.9685958094.

It can be divided in two parts, 38947 and 393, that added together give a triangular number (39340 = T₂₈₀).

The spelling of 38947393 in words is "thirty-eight million, nine hundred forty-seven thousand, three hundred ninety-three".