978088645 has 4 divisors (see below), whose sum is σ = 1173706380. Its totient is φ = 782470912.

The previous prime is 978088637. The next prime is 978088667. The reversal of 978088645 is 546880879.

978088645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 232471009 + 745617636 = 15247^2 + 27306^2 .

It is a cyclic number.

It is not a de Polignac number, because 978088645 - 2³ = 978088637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97808860 + ... + 97808869.

It is an arithmetic number, because the mean of its divisors is an integer number (293426595).

Almost surely, 2^978088645 is an apocalyptic number.

It is an amenable number.

978088645 is a deficient number, since it is larger than the sum of its proper divisors (195617735).

978088645 is a wasteful number, since it uses less digits than its factorization.

978088645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195617734.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The square root of 978088645 is about 31274.4087873776. The cubic root of 978088645 is about 992.6422107132.

The spelling of 978088645 in words is "nine hundred seventy-eight million, eighty-eight thousand, six hundred forty-five".