305421244393 has 2 divisors, whose sum is σ = 305421244394. Its totient is φ = 305421244392.

The previous prime is 305421244307. The next prime is 305421244433. The reversal of 305421244393 is 393442124503.

It is a happy number.

It is an a-pointer prime, because the next prime (305421244433) can be obtained adding 305421244393 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303063462144 + 2357782249 = 550512^2 + 48557^2 .

It is a cyclic number.

It is not a de Polignac number, because 305421244393 - 2³⁷ = 167982290921 is a prime.

It is not a weakly prime, because it can be changed into another prime (305424244393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152710622196 + 152710622197.

It is an arithmetic number, because the mean of its divisors is an integer number (152710622197).

Almost surely, 2^305421244393 is an apocalyptic number.

It is an amenable number.

305421244393 is a deficient number, since it is larger than the sum of its proper divisors (1).

305421244393 is an equidigital number, since it uses as much as digits as its factorization.

305421244393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 40.

Adding to 305421244393 its reverse (393442124503), we get a palindrome (698863368896).

The spelling of 305421244393 in words is "three hundred five billion, four hundred twenty-one million, two hundred forty-four thousand, three hundred ninety-three".