978164449 has 16 divisors (see below), whose sum is σ = 1037729232. Its totient is φ = 920844288.

The previous prime is 978164417. The next prime is 978164459. The reversal of 978164449 is 944461879.

It can be written as a sum of positive squares in 8 ways, for example, as 26010000 + 952154449 = 5100^2 + 30857^2 .

It is a cyclic number.

It is not a de Polignac number, because 978164449 - 2⁵ = 978164417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978164396 and 978164405.

It is not an unprimeable number, because it can be changed into a prime (978164459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139737 + ... + 146569.

It is an arithmetic number, because the mean of its divisors is an integer number (64858077).

Almost surely, 2^978164449 is an apocalyptic number.

It is an amenable number.

978164449 is a deficient number, since it is larger than the sum of its proper divisors (59564783).

978164449 is a wasteful number, since it uses less digits than its factorization.

978164449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6996.

The product of its digits is 1741824, while the sum is 52.

The square root of 978164449 is about 31275.6206812910. The cubic root of 978164449 is about 992.6678540284.

The spelling of 978164449 in words is "nine hundred seventy-eight million, one hundred sixty-four thousand, four hundred forty-nine".