38539491979 has 2 divisors, whose sum is σ = 38539491980. Its totient is φ = 38539491978.

The previous prime is 38539491953. The next prime is 38539492021. The reversal of 38539491979 is 97919493583.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38539491979 - 2⁹ = 38539491467 is a prime.

It is not a weakly prime, because it can be changed into another prime (38539491919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19269745989 + 19269745990.

It is an arithmetic number, because the mean of its divisors is an integer number (19269745990).

Almost surely, 2^38539491979 is an apocalyptic number.

38539491979 is a deficient number, since it is larger than the sum of its proper divisors (1).

38539491979 is an equidigital number, since it uses as much as digits as its factorization.

38539491979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 66134880, while the sum is 67.

The spelling of 38539491979 in words is "thirty-eight billion, five hundred thirty-nine million, four hundred ninety-one thousand, nine hundred seventy-nine".