423206669 has 2 divisors, whose sum is σ = 423206670. Its totient is φ = 423206668.

The previous prime is 423206611. The next prime is 423206689. The reversal of 423206669 is 966602324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418202500 + 5004169 = 20450^2 + 2237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423206669 is a prime.

It is a super-2 number, since 2×423206669² = 358207769372151122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423206689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211603334 + 211603335.

It is an arithmetic number, because the mean of its divisors is an integer number (211603335).

Almost surely, 2^423206669 is an apocalyptic number.

It is an amenable number.

423206669 is a deficient number, since it is larger than the sum of its proper divisors (1).

423206669 is an equidigital number, since it uses as much as digits as its factorization.

423206669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 423206669 is about 20571.9874829828. The cubic root of 423206669 is about 750.7883083215.

The spelling of 423206669 in words is "four hundred twenty-three million, two hundred six thousand, six hundred sixty-nine".