489905477 has 2 divisors, whose sum is σ = 489905478. Its totient is φ = 489905476.

The previous prime is 489905461. The next prime is 489905489. The reversal of 489905477 is 774509984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457574881 + 32330596 = 21391^2 + 5686^2 .

It is a cyclic number.

It is not a de Polignac number, because 489905477 - 2⁴ = 489905461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489905417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244952738 + 244952739.

It is an arithmetic number, because the mean of its divisors is an integer number (244952739).

Almost surely, 2^489905477 is an apocalyptic number.

It is an amenable number.

489905477 is a deficient number, since it is larger than the sum of its proper divisors (1).

489905477 is an equidigital number, since it uses as much as digits as its factorization.

489905477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 489905477 is about 22133.8084612658. The cubic root of 489905477 is about 788.3228195608.

The spelling of 489905477 in words is "four hundred eighty-nine million, nine hundred five thousand, four hundred seventy-seven".