38021749 has 2 divisors, whose sum is σ = 38021750. Its totient is φ = 38021748.

The previous prime is 38021743. The next prime is 38021759. The reversal of 38021749 is 94712083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35640900 + 2380849 = 5970^2 + 1543^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38021749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38021743) 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, 19010874 + 19010875.

It is an arithmetic number, because the mean of its divisors is an integer number (19010875).

Almost surely, 2^38021749 is an apocalyptic number.

It is an amenable number.

38021749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38021749 is an equidigital number, since it uses as much as digits as its factorization.

38021749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 38021749 is about 6166.1778274714. The cubic root of 38021749 is about 336.2616684498.

The spelling of 38021749 in words is "thirty-eight million, twenty-one thousand, seven hundred forty-nine".