978567871 has 8 divisors (see below), whose sum is σ = 1002933504. Its totient is φ = 954350040.

The previous prime is 978567853. The next prime is 978567901. The reversal of 978567871 is 178765879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 978567871 - 2⁷ = 978567743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (978567841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23485 + ... + 50086.

It is an arithmetic number, because the mean of its divisors is an integer number (125366688).

Almost surely, 2^978567871 is an apocalyptic number.

978567871 is a deficient number, since it is larger than the sum of its proper divisors (24365633).

978567871 is a wasteful number, since it uses less digits than its factorization.

978567871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73901.

The product of its digits is 5927040, while the sum is 58.

The square root of 978567871 is about 31282.0694807744. The cubic root of 978567871 is about 992.8043031398.

The spelling of 978567871 in words is "nine hundred seventy-eight million, five hundred sixty-seven thousand, eight hundred seventy-one".