486989861 has 2 divisors, whose sum is σ = 486989862. Its totient is φ = 486989860.

The previous prime is 486989857. The next prime is 486989929. The reversal of 486989861 is 168989684.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445632100 + 41357761 = 21110^2 + 6431^2 .

It is a cyclic number.

It is not a de Polignac number, because 486989861 - 2² = 486989857 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 486989861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (486989831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243494930 + 243494931.

It is an arithmetic number, because the mean of its divisors is an integer number (243494931).

Almost surely, 2^486989861 is an apocalyptic number.

It is an amenable number.

486989861 is a deficient number, since it is larger than the sum of its proper divisors (1).

486989861 is an equidigital number, since it uses as much as digits as its factorization.

486989861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 59.

The square root of 486989861 is about 22067.8467685454. The cubic root of 486989861 is about 786.7558360531.

The spelling of 486989861 in words is "four hundred eighty-six million, nine hundred eighty-nine thousand, eight hundred sixty-one".