1343408762921 has 2 divisors, whose sum is σ = 1343408762922. Its totient is φ = 1343408762920.

The previous prime is 1343408762911. The next prime is 1343408762981. The reversal of 1343408762921 is 1292678043431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 730664234521 + 612744528400 = 854789^2 + 782780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1343408762921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1343408762921.

It is not a weakly prime, because it can be changed into another prime (1343408762911) 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, 671704381460 + 671704381461.

It is an arithmetic number, because the mean of its divisors is an integer number (671704381461).

Almost surely, 2^{1343408762921} is an apocalyptic number.

It is an amenable number.

1343408762921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343408762921 is an equidigital number, since it uses as much as digits as its factorization.

1343408762921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 1343408762921 in words is "one trillion, three hundred forty-three billion, four hundred eight million, seven hundred sixty-two thousand, nine hundred twenty-one".