423421185749 has 2 divisors, whose sum is σ = 423421185750. Its totient is φ = 423421185748.

The previous prime is 423421185743. The next prime is 423421185769. The reversal of 423421185749 is 947581124324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421915202500 + 1505983249 = 649550^2 + 38807^2 .

It is a cyclic number.

It is not a de Polignac number, because 423421185749 - 2²⁴ = 423404408533 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423421185697 and 423421185706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423421185743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211710592874 + 211710592875.

It is an arithmetic number, because the mean of its divisors is an integer number (211710592875).

Almost surely, 2^423421185749 is an apocalyptic number.

It is an amenable number.

423421185749 is a deficient number, since it is larger than the sum of its proper divisors (1).

423421185749 is an equidigital number, since it uses as much as digits as its factorization.

423421185749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 50.

The spelling of 423421185749 in words is "four hundred twenty-three billion, four hundred twenty-one million, one hundred eighty-five thousand, seven hundred forty-nine".