978245867 has 4 divisors (see below), whose sum is σ = 1020778320. Its totient is φ = 935713416.

The previous prime is 978245819. The next prime is 978245869. The reversal of 978245867 is 768542879.

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

It is not a de Polignac number, because 978245867 - 2¹⁸ = 977983723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (978245869) 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, 21266192 + ... + 21266237.

It is an arithmetic number, because the mean of its divisors is an integer number (255194580).

Almost surely, 2^978245867 is an apocalyptic number.

978245867 is a deficient number, since it is larger than the sum of its proper divisors (42532453).

978245867 is a wasteful number, since it uses less digits than its factorization.

978245867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42532452.

The product of its digits is 6773760, while the sum is 56.

The square root of 978245867 is about 31276.9222750577. The cubic root of 978245867 is about 992.6953949970.

The spelling of 978245867 in words is "nine hundred seventy-eight million, two hundred forty-five thousand, eight hundred sixty-seven".