423428947 has 2 divisors, whose sum is σ = 423428948. Its totient is φ = 423428946.

The previous prime is 423428933. The next prime is 423428953. The reversal of 423428947 is 749824324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423428947 - 2¹⁹ = 422904659 is a prime.

It is not a weakly prime, because it can be changed into another prime (423428917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211714473 + 211714474.

It is an arithmetic number, because the mean of its divisors is an integer number (211714474).

Almost surely, 2^423428947 is an apocalyptic number.

423428947 is a deficient number, since it is larger than the sum of its proper divisors (1).

423428947 is an equidigital number, since it uses as much as digits as its factorization.

423428947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 43.

The square root of 423428947 is about 20577.3892172938. The cubic root of 423428947 is about 750.9197291515.

The spelling of 423428947 in words is "four hundred twenty-three million, four hundred twenty-eight thousand, nine hundred forty-seven".