978101825 has 6 divisors (see below), whose sum is σ = 1212846294. Its totient is φ = 782481440.

The previous prime is 978101807. The next prime is 978101837. The reversal of 978101825 is 528101879.

It can be written as a sum of positive squares in 3 ways, for example, as 72573361 + 905528464 = 8519^2 + 30092^2 .

It is a de Polignac number, because none of the positive numbers 2^k-978101825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19562012 + ... + 19562061.

It is an arithmetic number, because the mean of its divisors is an integer number (202141049).

Almost surely, 2^978101825 is an apocalyptic number.

It is an amenable number.

978101825 is a deficient number, since it is larger than the sum of its proper divisors (234744469).

978101825 is a wasteful number, since it uses less digits than its factorization.

978101825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39124083 (or 39124078 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 978101825 is about 31274.6195020819. The cubic root of 978101825 is about 992.6466693975.

The spelling of 978101825 in words is "nine hundred seventy-eight million, one hundred one thousand, eight hundred twenty-five".