428274305491 has 2 divisors, whose sum is σ = 428274305492. Its totient is φ = 428274305490.

The previous prime is 428274305479. The next prime is 428274305507. The reversal of 428274305491 is 194503472824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428274305491 - 2⁹ = 428274304979 is a prime.

It is not a weakly prime, because it can be changed into another prime (428274305891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214137152745 + 214137152746.

It is an arithmetic number, because the mean of its divisors is an integer number (214137152746).

Almost surely, 2^428274305491 is an apocalyptic number.

428274305491 is a deficient number, since it is larger than the sum of its proper divisors (1).

428274305491 is an equidigital number, since it uses as much as digits as its factorization.

428274305491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 428274305491 in words is "four hundred twenty-eight billion, two hundred seventy-four million, three hundred five thousand, four hundred ninety-one".