489977 has 2 divisors, whose sum is σ = 489978. Its totient is φ = 489976.

The previous prime is 489961. The next prime is 489989. The reversal of 489977 is 779984.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 434281 + 55696 = 659^2 + 236^2 .

It is a cyclic number.

It is not a de Polignac number, because 489977 - 2⁴ = 489961 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 (489677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244988 + 244989.

It is an arithmetic number, because the mean of its divisors is an integer number (244989).

2⁴⁸⁹⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

489977 is a deficient number, since it is larger than the sum of its proper divisors (1).

489977 is an equidigital number, since it uses as much as digits as its factorization.

489977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 489977 is about 699.9835712358. The cubic root of 489977 is about 78.8361181022.

It can be divided in two parts, 489 and 977, that multiplied together give a triangular number (477753 = T₉₇₇).

The spelling of 489977 in words is "four hundred eighty-nine thousand, nine hundred seventy-seven".