426239968477 has 2 divisors, whose sum is σ = 426239968478. Its totient is φ = 426239968476.

The previous prime is 426239968433. The next prime is 426239968499. The reversal of 426239968477 is 774869932624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395130416836 + 31109551641 = 628594^2 + 176379^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426239968477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426239968417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213119984238 + 213119984239.

It is an arithmetic number, because the mean of its divisors is an integer number (213119984239).

Almost surely, 2^426239968477 is an apocalyptic number.

It is an amenable number.

426239968477 is a deficient number, since it is larger than the sum of its proper divisors (1).

426239968477 is an equidigital number, since it uses as much as digits as its factorization.

426239968477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 219469824, while the sum is 67.

The spelling of 426239968477 in words is "four hundred twenty-six billion, two hundred thirty-nine million, nine hundred sixty-eight thousand, four hundred seventy-seven".