978925761 has 48 divisors (see below), whose sum is σ = 1594157760. Its totient is φ = 573644160.

The previous prime is 978925697. The next prime is 978925763. The reversal of 978925761 is 167529879.

It is not a de Polignac number, because 978925761 - 2⁶ = 978925697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 978925698 and 978925707.

It is not an unprimeable number, because it can be changed into a prime (978925763) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 654931 + ... + 656423.

It is an arithmetic number, because the mean of its divisors is an integer number (33211620).

Almost surely, 2^978925761 is an apocalyptic number.

It is an amenable number.

978925761 is a deficient number, since it is larger than the sum of its proper divisors (615231999).

978925761 is a wasteful number, since it uses less digits than its factorization.

978925761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726 (or 1723 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 54.

The square root of 978925761 is about 31287.7893274677. The cubic root of 978925761 is about 992.9253206100.

The spelling of 978925761 in words is "nine hundred seventy-eight million, nine hundred twenty-five thousand, seven hundred sixty-one".