38979947 has 2 divisors, whose sum is σ = 38979948. Its totient is φ = 38979946.

The previous prime is 38979937. The next prime is 38979977. The reversal of 38979947 is 74997983.

38979947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (74997983) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38979947 - 2¹⁴ = 38963563 is a prime.

It is a super-3 number, since 3×38979947³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38979892 and 38979901.

It is not a weakly prime, because it can be changed into another prime (38979937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19489973 + 19489974.

It is an arithmetic number, because the mean of its divisors is an integer number (19489974).

Almost surely, 2^38979947 is an apocalyptic number.

38979947 is a deficient number, since it is larger than the sum of its proper divisors (1).

38979947 is an equidigital number, since it uses as much as digits as its factorization.

38979947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 56.

The square root of 38979947 is about 6243.3922670292. The cubic root of 38979947 is about 339.0630112913.

The spelling of 38979947 in words is "thirty-eight million, nine hundred seventy-nine thousand, nine hundred forty-seven".