1078968391 has 2 divisors, whose sum is σ = 1078968392. Its totient is φ = 1078968390.

The previous prime is 1078968383. The next prime is 1078968413. The reversal of 1078968391 is 1938698701.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1078968391 - 2³ = 1078968383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078968301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539484195 + 539484196.

It is an arithmetic number, because the mean of its divisors is an integer number (539484196).

Almost surely, 2^1078968391 is an apocalyptic number.

1078968391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078968391 is an equidigital number, since it uses as much as digits as its factorization.

1078968391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 52.

The square root of 1078968391 is about 32847.6542693691. The cubic root of 1078968391 is about 1025.6587923510.

The spelling of 1078968391 in words is "one billion, seventy-eight million, nine hundred sixty-eight thousand, three hundred ninety-one".