976678561 has 2 divisors, whose sum is σ = 976678562. Its totient is φ = 976678560.

The previous prime is 976678553. The next prime is 976678597. The reversal of 976678561 is 165876679.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945931536 + 30747025 = 30756^2 + 5545^2 .

It is a cyclic number.

It is not a de Polignac number, because 976678561 - 2³ = 976678553 is a prime.

It is not a weakly prime, because it can be changed into another prime (976678531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488339280 + 488339281.

It is an arithmetic number, because the mean of its divisors is an integer number (488339281).

Almost surely, 2^976678561 is an apocalyptic number.

It is an amenable number.

976678561 is a deficient number, since it is larger than the sum of its proper divisors (1).

976678561 is an equidigital number, since it uses as much as digits as its factorization.

976678561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 55.

The square root of 976678561 is about 31251.8569208295. The cubic root of 976678561 is about 992.1649594653.

The spelling of 976678561 in words is "nine hundred seventy-six million, six hundred seventy-eight thousand, five hundred sixty-one".