497989 has 2 divisors, whose sum is σ = 497990. Its totient is φ = 497988.

The previous prime is 497977. The next prime is 497993. The reversal of 497989 is 989794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432964 + 65025 = 658^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 497989 - 2⁵ = 497957 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (497929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248994 + 248995.

It is an arithmetic number, because the mean of its divisors is an integer number (248995).

2⁴⁹⁷⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

497989 is a deficient number, since it is larger than the sum of its proper divisors (1).

497989 is an equidigital number, since it uses as much as digits as its factorization.

497989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 497989 is about 705.6833567543. The cubic root of 497989 is about 79.2635008362.

The spelling of 497989 in words is "four hundred ninety-seven thousand, nine hundred eighty-nine".