838978579 has 2 divisors, whose sum is σ = 838978580. Its totient is φ = 838978578.

The previous prime is 838978541. The next prime is 838978597. The reversal of 838978579 is 975879838.

Together with next prime (838978597) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 838978579 - 2²³ = 830589971 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 838978579.

It is not a weakly prime, because it can be changed into another prime (838978519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419489289 + 419489290.

It is an arithmetic number, because the mean of its divisors is an integer number (419489290).

Almost surely, 2^838978579 is an apocalyptic number.

838978579 is a deficient number, since it is larger than the sum of its proper divisors (1).

838978579 is an equidigital number, since it uses as much as digits as its factorization.

838978579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30481920, while the sum is 64.

The square root of 838978579 is about 28965.1269460363. The cubic root of 838978579 is about 943.1562003341.

It can be divided in two parts, 8389 and 78579, that added together give a palindrome (86968).

The spelling of 838978579 in words is "eight hundred thirty-eight million, nine hundred seventy-eight thousand, five hundred seventy-nine".