423212249 has 2 divisors, whose sum is σ = 423212250. Its totient is φ = 423212248.

The previous prime is 423212239. The next prime is 423212303. The reversal of 423212249 is 942212324.

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., 420865225 + 2347024 = 20515^2 + 1532^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423212249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (423212219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211606124 + 211606125.

It is an arithmetic number, because the mean of its divisors is an integer number (211606125).

Almost surely, 2^423212249 is an apocalyptic number.

It is an amenable number.

423212249 is a deficient number, since it is larger than the sum of its proper divisors (1).

423212249 is an equidigital number, since it uses as much as digits as its factorization.

423212249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

The square root of 423212249 is about 20572.1231038510. The cubic root of 423212249 is about 750.7916080335.

The spelling of 423212249 in words is "four hundred twenty-three million, two hundred twelve thousand, two hundred forty-nine".