428724364309 has 2 divisors, whose sum is σ = 428724364310. Its totient is φ = 428724364308.

The previous prime is 428724364247. The next prime is 428724364361. The reversal of 428724364309 is 903463427824.

It is an a-pointer prime, because the next prime (428724364361) can be obtained adding 428724364309 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365635483684 + 63088880625 = 604678^2 + 251175^2 .

It is a cyclic number.

It is not a de Polignac number, because 428724364309 - 2¹⁷ = 428724233237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428724364379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214362182154 + 214362182155.

It is an arithmetic number, because the mean of its divisors is an integer number (214362182155).

Almost surely, 2^428724364309 is an apocalyptic number.

It is an amenable number.

428724364309 is a deficient number, since it is larger than the sum of its proper divisors (1).

428724364309 is an equidigital number, since it uses as much as digits as its factorization.

428724364309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6967296, while the sum is 52.

The spelling of 428724364309 in words is "four hundred twenty-eight billion, seven hundred twenty-four million, three hundred sixty-four thousand, three hundred nine".