38133749 has 2 divisors, whose sum is σ = 38133750. Its totient is φ = 38133748.

The previous prime is 38133743. The next prime is 38133757. The reversal of 38133749 is 94733183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19272100 + 18861649 = 4390^2 + 4343^2 .

It is a cyclic number.

It is not a de Polignac number, because 38133749 - 2⁸ = 38133493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38133743) 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, 19066874 + 19066875.

It is an arithmetic number, because the mean of its divisors is an integer number (19066875).

Almost surely, 2^38133749 is an apocalyptic number.

It is an amenable number.

38133749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38133749 is an equidigital number, since it uses as much as digits as its factorization.

38133749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 38.

The square root of 38133749 is about 6175.2529502847. The cubic root of 38133749 is about 336.5915181529.

The spelling of 38133749 in words is "thirty-eight million, one hundred thirty-three thousand, seven hundred forty-nine".