1078840657 has 2 divisors, whose sum is σ = 1078840658. Its totient is φ = 1078840656.

The previous prime is 1078840649. The next prime is 1078840663. The reversal of 1078840657 is 7560488701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 829958481 + 248882176 = 28809^2 + 15776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1078840657 - 2³ = 1078840649 is a prime.

It is not a weakly prime, because it can be changed into another prime (1078840627) 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, 539420328 + 539420329.

It is an arithmetic number, because the mean of its divisors is an integer number (539420329).

Almost surely, 2^1078840657 is an apocalyptic number.

It is an amenable number.

1078840657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078840657 is an equidigital number, since it uses as much as digits as its factorization.

1078840657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 1078840657 is about 32845.7098720670. The cubic root of 1078840657 is about 1025.6183164447.

The spelling of 1078840657 in words is "one billion, seventy-eight million, eight hundred forty thousand, six hundred fifty-seven".