662819 has 2 divisors, whose sum is σ = 662820. Its totient is φ = 662818.

The previous prime is 662797. The next prime is 662833. The reversal of 662819 is 918266.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662819 is a prime.

It is a super-2 number, since 2×662819² = 878658053522, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (662839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331409 + 331410.

It is an arithmetic number, because the mean of its divisors is an integer number (331410).

2⁶⁶²⁸¹⁹ is an apocalyptic number.

662819 is a deficient number, since it is larger than the sum of its proper divisors (1).

662819 is an equidigital number, since it uses as much as digits as its factorization.

662819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 662819 is about 814.1369663638. The cubic root of 662819 is about 87.1896597873.

The spelling of 662819 in words is "six hundred sixty-two thousand, eight hundred nineteen".