38681947 has 2 divisors, whose sum is σ = 38681948. Its totient is φ = 38681946.

The previous prime is 38681941. The next prime is 38681957. The reversal of 38681947 is 74918683.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38681947 - 2³ = 38681939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38681897 and 38681906.

It is not a weakly prime, because it can be changed into another prime (38681941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19340973 + 19340974.

It is an arithmetic number, because the mean of its divisors is an integer number (19340974).

Almost surely, 2^38681947 is an apocalyptic number.

38681947 is a deficient number, since it is larger than the sum of its proper divisors (1).

38681947 is an equidigital number, since it uses as much as digits as its factorization.

38681947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 38681947 is about 6219.4812484644. The cubic root of 38681947 is about 338.1967593809.

The spelling of 38681947 in words is "thirty-eight million, six hundred eighty-one thousand, nine hundred forty-seven".