38394749 has 2 divisors, whose sum is σ = 38394750. Its totient is φ = 38394748.

The previous prime is 38394739. The next prime is 38394757. The reversal of 38394749 is 94749383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36517849 + 1876900 = 6043^2 + 1370^2 .

It is an emirp because it is prime and its reverse (94749383) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38394749 - 2²⁰ = 37346173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38394739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19197374 + 19197375.

It is an arithmetic number, because the mean of its divisors is an integer number (19197375).

Almost surely, 2^38394749 is an apocalyptic number.

It is an amenable number.

38394749 is a deficient number, since it is larger than the sum of its proper divisors (1).

38394749 is an equidigital number, since it uses as much as digits as its factorization.

38394749 is an evil number, because the sum of its binary digits is even.

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

The square root of 38394749 is about 6196.3496512059. The cubic root of 38394749 is about 337.3576874165.

The spelling of 38394749 in words is "thirty-eight million, three hundred ninety-four thousand, seven hundred forty-nine".