340024440421 has 2 divisors, whose sum is σ = 340024440422. Its totient is φ = 340024440420.

The previous prime is 340024440403. The next prime is 340024440479. The reversal of 340024440421 is 124044420043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337962009025 + 2062431396 = 581345^2 + 45414^2 .

It is a cyclic number.

It is not a de Polignac number, because 340024440421 - 2¹³ = 340024432229 is a prime.

It is a super-2 number, since 2×340024440421² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 340024440421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340024444421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170012220210 + 170012220211.

It is an arithmetic number, because the mean of its divisors is an integer number (170012220211).

Almost surely, 2^340024440421 is an apocalyptic number.

It is an amenable number.

340024440421 is a deficient number, since it is larger than the sum of its proper divisors (1).

340024440421 is an equidigital number, since it uses as much as digits as its factorization.

340024440421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 340024440421 its reverse (124044420043), we get a palindrome (464068860464).

The spelling of 340024440421 in words is "three hundred forty billion, twenty-four million, four hundred forty thousand, four hundred twenty-one".