978173316 has 18 divisors (see below), whose sum is σ = 2472604862. Its totient is φ = 326057760.

The previous prime is 978173309. The next prime is 978173323. The reversal of 978173316 is 613371879.

It is an interprime number because it is at equal distance from previous prime (978173309) and next prime (978173323).

It can be written as a sum of positive squares in only one way, i.e., 623001600 + 355171716 = 24960^2 + 18846^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×978173316² = 1913646072268871712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13585705 + ... + 13585776.

Almost surely, 2^978173316 is an apocalyptic number.

It is an amenable number.

978173316 is an abundant number, since it is smaller than the sum of its proper divisors (1494431546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

978173316 is a wasteful number, since it uses less digits than its factorization.

978173316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27171491 (or 27171486 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 978173316 is about 31275.7624367496. The cubic root of 978173316 is about 992.6708535102.

The spelling of 978173316 in words is "nine hundred seventy-eight million, one hundred seventy-three thousand, three hundred sixteen".