486661961 has 2 divisors, whose sum is σ = 486661962. Its totient is φ = 486661960.

The previous prime is 486661939. The next prime is 486661979. The reversal of 486661961 is 169166684.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474411961 + 12250000 = 21781^2 + 3500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-486661961 is a prime.

It is not a weakly prime, because it can be changed into another prime (486661921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243330980 + 243330981.

It is an arithmetic number, because the mean of its divisors is an integer number (243330981).

Almost surely, 2^486661961 is an apocalyptic number.

It is an amenable number.

486661961 is a deficient number, since it is larger than the sum of its proper divisors (1).

486661961 is an equidigital number, since it uses as much as digits as its factorization.

486661961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 486661961 is about 22060.4161565461. The cubic root of 486661961 is about 786.5792169340.

The spelling of 486661961 in words is "four hundred eighty-six million, six hundred sixty-one thousand, nine hundred sixty-one".