423542417 has 2 divisors, whose sum is σ = 423542418. Its totient is φ = 423542416.

The previous prime is 423542411. The next prime is 423542473. The reversal of 423542417 is 714245324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320803921 + 102738496 = 17911^2 + 10136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423542417 is a prime.

It is not a weakly prime, because it can be changed into another prime (423542411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211771208 + 211771209.

It is an arithmetic number, because the mean of its divisors is an integer number (211771209).

Almost surely, 2^423542417 is an apocalyptic number.

It is an amenable number.

423542417 is a deficient number, since it is larger than the sum of its proper divisors (1).

423542417 is an equidigital number, since it uses as much as digits as its factorization.

423542417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 32.

The square root of 423542417 is about 20580.1461850979. The cubic root of 423542417 is about 750.9868000278.

The spelling of 423542417 in words is "four hundred twenty-three million, five hundred forty-two thousand, four hundred seventeen".