420774723137 has 2 divisors, whose sum is σ = 420774723138. Its totient is φ = 420774723136.

The previous prime is 420774723133. The next prime is 420774723143. The reversal of 420774723137 is 731327477024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383760426256 + 37014296881 = 619484^2 + 192391^2 .

It is a cyclic number.

It is not a de Polignac number, because 420774723137 - 2² = 420774723133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420774723091 and 420774723100.

It is not a weakly prime, because it can be changed into another prime (420774723133) 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, 210387361568 + 210387361569.

It is an arithmetic number, because the mean of its divisors is an integer number (210387361569).

Almost surely, 2^420774723137 is an apocalyptic number.

It is an amenable number.

420774723137 is a deficient number, since it is larger than the sum of its proper divisors (1).

420774723137 is an equidigital number, since it uses as much as digits as its factorization.

420774723137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1382976, while the sum is 47.

The spelling of 420774723137 in words is "four hundred twenty billion, seven hundred seventy-four million, seven hundred twenty-three thousand, one hundred thirty-seven".