1031978879 has 2 divisors, whose sum is σ = 1031978880. Its totient is φ = 1031978878.

The previous prime is 1031978867. The next prime is 1031978929. The reversal of 1031978879 is 9788791301.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031978879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1031978879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031978839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515989439 + 515989440.

It is an arithmetic number, because the mean of its divisors is an integer number (515989440).

Almost surely, 2^1031978879 is an apocalyptic number.

1031978879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031978879 is an equidigital number, since it uses as much as digits as its factorization.

1031978879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 53.

The square root of 1031978879 is about 32124.4280727299. The cubic root of 1031978879 is about 1010.5479753606.

It can be divided in two parts, 10319 and 78879, that added together give a palindrome (89198).

The spelling of 1031978879 in words is "one billion, thirty-one million, nine hundred seventy-eight thousand, eight hundred seventy-nine".