423455449973 has 2 divisors, whose sum is σ = 423455449974. Its totient is φ = 423455449972.

The previous prime is 423455449933. The next prime is 423455450027. The reversal of 423455449973 is 379944554324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349945599844 + 73509850129 = 591562^2 + 271127^2 .

It is a cyclic number.

It is not a de Polignac number, because 423455449973 - 2⁶ = 423455449909 is a prime.

It is a super-2 number, since 2×423455449973² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423455449933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211727724986 + 211727724987.

It is an arithmetic number, because the mean of its divisors is an integer number (211727724987).

Almost surely, 2^423455449973 is an apocalyptic number.

It is an amenable number.

423455449973 is a deficient number, since it is larger than the sum of its proper divisors (1).

423455449973 is an equidigital number, since it uses as much as digits as its factorization.

423455449973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 65318400, while the sum is 59.

The spelling of 423455449973 in words is "four hundred twenty-three billion, four hundred fifty-five million, four hundred forty-nine thousand, nine hundred seventy-three".