343071762057421 has 2 divisors, whose sum is σ = 343071762057422. Its totient is φ = 343071762057420.

The previous prime is 343071762057419. The next prime is 343071762057439. The reversal of 343071762057421 is 124750267170343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341753972854921 + 1317789202500 = 18486589^2 + 1147950^2 .

It is an emirp because it is prime and its reverse (124750267170343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343071762057421 - 2¹ = 343071762057419 is a prime.

Together with 343071762057419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343071762057221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171535881028710 + 171535881028711.

It is an arithmetic number, because the mean of its divisors is an integer number (171535881028711).

Almost surely, 2^{343071762057421} is an apocalyptic number.

It is an amenable number.

343071762057421 is a deficient number, since it is larger than the sum of its proper divisors (1).

343071762057421 is an equidigital number, since it uses as much as digits as its factorization.

343071762057421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 52.

The spelling of 343071762057421 in words is "three hundred forty-three trillion, seventy-one billion, seven hundred sixty-two million, fifty-seven thousand, four hundred twenty-one".