488591861 has 2 divisors, whose sum is σ = 488591862. Its totient is φ = 488591860.

The previous prime is 488591839. The next prime is 488591869. The reversal of 488591861 is 168195884.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394618225 + 93973636 = 19865^2 + 9694^2 .

It is a cyclic number.

It is not a de Polignac number, because 488591861 - 2¹⁸ = 488329717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (488591869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244295930 + 244295931.

It is an arithmetic number, because the mean of its divisors is an integer number (244295931).

Almost surely, 2^488591861 is an apocalyptic number.

It is an amenable number.

488591861 is a deficient number, since it is larger than the sum of its proper divisors (1).

488591861 is an equidigital number, since it uses as much as digits as its factorization.

488591861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 552960, while the sum is 50.

The square root of 488591861 is about 22104.1141193218. The cubic root of 488591861 is about 787.6175948016.

The spelling of 488591861 in words is "four hundred eighty-eight million, five hundred ninety-one thousand, eight hundred sixty-one".