662354789 has 2 divisors, whose sum is σ = 662354790. Its totient is φ = 662354788.

The previous prime is 662354783. The next prime is 662354807. The reversal of 662354789 is 987453266.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558518689 + 103836100 = 23633^2 + 10190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-662354789 is a prime.

It is a super-2 number, since 2×662354789² = 877427733022469042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662354783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331177394 + 331177395.

It is an arithmetic number, because the mean of its divisors is an integer number (331177395).

Almost surely, 2^662354789 is an apocalyptic number.

It is an amenable number.

662354789 is a deficient number, since it is larger than the sum of its proper divisors (1).

662354789 is an equidigital number, since it uses as much as digits as its factorization.

662354789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 50.

The square root of 662354789 is about 25736.2543700516. The cubic root of 662354789 is about 871.6930035698.

The spelling of 662354789 in words is "six hundred sixty-two million, three hundred fifty-four thousand, seven hundred eighty-nine".