662939 has 2 divisors, whose sum is σ = 662940. Its totient is φ = 662938.

The previous prime is 662917. The next prime is 662941. The reversal of 662939 is 939266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 662939 - 2¹⁶ = 597403 is a prime.

Together with 662941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 662899 and 662908.

It is not a weakly prime, because it can be changed into another prime (662999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331469 + 331470.

It is an arithmetic number, because the mean of its divisors is an integer number (331470).

2⁶⁶²⁹³⁹ is an apocalyptic number.

662939 is a deficient number, since it is larger than the sum of its proper divisors (1).

662939 is an equidigital number, since it uses as much as digits as its factorization.

662939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 35.

The square root of 662939 is about 814.2106607015. The cubic root of 662939 is about 87.1949212175.

The spelling of 662939 in words is "six hundred sixty-two thousand, nine hundred thirty-nine".