662539 has 2 divisors, whose sum is σ = 662540. Its totient is φ = 662538.

The previous prime is 662537. The next prime is 662551. The reversal of 662539 is 935266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662539 - 2¹ = 662537 is a prime.

Together with 662537, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 6 + 6 + 5 + 2¹⁷ + 3¹² + 9 .

It is a self number, because there is not a number n which added to its sum of digits gives 662539.

It is not a weakly prime, because it can be changed into another prime (662531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331269 + 331270.

It is an arithmetic number, because the mean of its divisors is an integer number (331270).

2⁶⁶²⁵³⁹ is an apocalyptic number.

662539 is a deficient number, since it is larger than the sum of its proper divisors (1).

662539 is an equidigital number, since it uses as much as digits as its factorization.

662539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 662539 is about 813.9649869620. The cubic root of 662539 is about 87.1773806466.

The spelling of 662539 in words is "six hundred sixty-two thousand, five hundred thirty-nine".