978842711 has 24 divisors (see below), whose sum is σ = 1296414336. Its totient is φ = 717851520.

The previous prime is 978842693. The next prime is 978842729. The reversal of 978842711 is 117248879.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (978842693) and next prime (978842729).

It is not a de Polignac number, because 978842711 - 2⁶ = 978842647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978812711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260 + ... + 44246.

It is an arithmetic number, because the mean of its divisors is an integer number (54017264).

Almost surely, 2^978842711 is an apocalyptic number.

978842711 is a deficient number, since it is larger than the sum of its proper divisors (317571625).

978842711 is a wasteful number, since it uses less digits than its factorization.

978842711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44039 (or 44022 counting only the distinct ones).

The product of its digits is 225792, while the sum is 47.

The square root of 978842711 is about 31286.4621042393. The cubic root of 978842711 is about 992.8972405848.

The spelling of 978842711 in words is "nine hundred seventy-eight million, eight hundred forty-two thousand, seven hundred eleven".