423029781749 has 2 divisors, whose sum is σ = 423029781750. Its totient is φ = 423029781748.

The previous prime is 423029781697. The next prime is 423029781767. The reversal of 423029781749 is 947187920324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413986722724 + 9043059025 = 643418^2 + 95095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423029781749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423029781694 and 423029781703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423029786749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211514890874 + 211514890875.

It is an arithmetic number, because the mean of its divisors is an integer number (211514890875).

Almost surely, 2^423029781749 is an apocalyptic number.

It is an amenable number.

423029781749 is a deficient number, since it is larger than the sum of its proper divisors (1).

423029781749 is an equidigital number, since it uses as much as digits as its factorization.

423029781749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 423029781749 in words is "four hundred twenty-three billion, twenty-nine million, seven hundred eighty-one thousand, seven hundred forty-nine".