900686489 has 2 divisors, whose sum is σ = 900686490. Its totient is φ = 900686488.

The previous prime is 900686467. The next prime is 900686551. The reversal of 900686489 is 984686009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660901264 + 239785225 = 25708^2 + 15485^2 .

It is a cyclic number.

It is not a de Polignac number, because 900686489 - 2¹⁶ = 900620953 is a prime.

It is a super-2 number, since 2×900686489² = 1622472302934294242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (900688489) 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, 450343244 + 450343245.

It is an arithmetic number, because the mean of its divisors is an integer number (450343245).

Almost surely, 2^900686489 is an apocalyptic number.

It is an amenable number.

900686489 is a deficient number, since it is larger than the sum of its proper divisors (1).

900686489 is an equidigital number, since it uses as much as digits as its factorization.

900686489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 900686489 is about 30011.4393023727. The cubic root of 900686489 is about 965.7348028996.

The spelling of 900686489 in words is "nine hundred million, six hundred eighty-six thousand, four hundred eighty-nine".