38783989 has 2 divisors, whose sum is σ = 38783990. Its totient is φ = 38783988.

The previous prime is 38783971. The next prime is 38784001. The reversal of 38783989 is 98938783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27615025 + 11168964 = 5255^2 + 3342^2 .

It is a cyclic number.

It is not a de Polignac number, because 38783989 - 2¹³ = 38775797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38783939) 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, 19391994 + 19391995.

It is an arithmetic number, because the mean of its divisors is an integer number (19391995).

Almost surely, 2^38783989 is an apocalyptic number.

It is an amenable number.

38783989 is a deficient number, since it is larger than the sum of its proper divisors (1).

38783989 is an equidigital number, since it uses as much as digits as its factorization.

38783989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2612736, while the sum is 55.

The square root of 38783989 is about 6227.6792627752. The cubic root of 38783989 is about 338.4938831044.

The spelling of 38783989 in words is "thirty-eight million, seven hundred eighty-three thousand, nine hundred eighty-nine".