978474871 has 4 divisors (see below), whose sum is σ = 1067427144. Its totient is φ = 889522600.

The previous prime is 978474859. The next prime is 978474911. The reversal of 978474871 is 178474879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 978474871 - 2⁵ = 978474839 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 (978474851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44476120 + ... + 44476141.

It is an arithmetic number, because the mean of its divisors is an integer number (266856786).

Almost surely, 2^978474871 is an apocalyptic number.

978474871 is a deficient number, since it is larger than the sum of its proper divisors (88952273).

978474871 is a wasteful number, since it uses less digits than its factorization.

978474871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88952272.

The product of its digits is 3161088, while the sum is 55.

The square root of 978474871 is about 31280.5829709102. The cubic root of 978474871 is about 992.7728511482.

The spelling of 978474871 in words is "nine hundred seventy-eight million, four hundred seventy-four thousand, eight hundred seventy-one".