38739691 has 2 divisors, whose sum is σ = 38739692. Its totient is φ = 38739690.

The previous prime is 38739683. The next prime is 38739707. The reversal of 38739691 is 19693783.

It is a weak prime.

It is an emirp because it is prime and its reverse (19693783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38739691 - 2³ = 38739683 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38739641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19369845 + 19369846.

It is an arithmetic number, because the mean of its divisors is an integer number (19369846).

Almost surely, 2^38739691 is an apocalyptic number.

38739691 is a deficient number, since it is larger than the sum of its proper divisors (1).

38739691 is an equidigital number, since it uses as much as digits as its factorization.

38739691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 38739691 is about 6224.1217051083. The cubic root of 38739691 is about 338.3649612232.

The spelling of 38739691 in words is "thirty-eight million, seven hundred thirty-nine thousand, six hundred ninety-one".