423521347 has 2 divisors, whose sum is σ = 423521348. Its totient is φ = 423521346.

The previous prime is 423521317. The next prime is 423521383. The reversal of 423521347 is 743125324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423521347 - 2¹⁵ = 423488579 is a prime.

It is not a weakly prime, because it can be changed into another prime (423521317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211760673 + 211760674.

It is an arithmetic number, because the mean of its divisors is an integer number (211760674).

Almost surely, 2^423521347 is an apocalyptic number.

423521347 is a deficient number, since it is larger than the sum of its proper divisors (1).

423521347 is an equidigital number, since it uses as much as digits as its factorization.

423521347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 31.

The square root of 423521347 is about 20579.6342776056. The cubic root of 423521347 is about 750.9743466869.

The spelling of 423521347 in words is "four hundred twenty-three million, five hundred twenty-one thousand, three hundred forty-seven".