978159346919 has 2 divisors, whose sum is σ = 978159346920. Its totient is φ = 978159346918.

The previous prime is 978159346861. The next prime is 978159346943. The reversal of 978159346919 is 919643951879.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-978159346919 is a prime.

It is a super-2 number, since 2×978159346919² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978159346949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489079673459 + 489079673460.

It is an arithmetic number, because the mean of its divisors is an integer number (489079673460).

Almost surely, 2^978159346919 is an apocalyptic number.

978159346919 is a deficient number, since it is larger than the sum of its proper divisors (1).

978159346919 is an equidigital number, since it uses as much as digits as its factorization.

978159346919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132269760, while the sum is 71.

The spelling of 978159346919 in words is "nine hundred seventy-eight billion, one hundred fifty-nine million, three hundred forty-six thousand, nine hundred nineteen".