978504965 has 8 divisors (see below), whose sum is σ = 1193455608. Its totient is φ = 769970880.

The previous prime is 978504949. The next prime is 978504977. The reversal of 978504965 is 569405879.

It can be written as a sum of positive squares in 4 ways, for example, as 46485124 + 932019841 = 6818^2 + 30529^2 .

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

It is not a de Polignac number, because 978504965 - 2⁴ = 978504949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1603802 + ... + 1604411.

It is an arithmetic number, because the mean of its divisors is an integer number (149181951).

Almost surely, 2^978504965 is an apocalyptic number.

It is an amenable number.

978504965 is a deficient number, since it is larger than the sum of its proper divisors (214950643).

978504965 is a wasteful number, since it uses less digits than its factorization.

978504965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3208279.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The square root of 978504965 is about 31281.0640004460. The cubic root of 978504965 is about 992.7830289602.

The spelling of 978504965 in words is "nine hundred seventy-eight million, five hundred four thousand, nine hundred sixty-five".