340955026421 has 2 divisors, whose sum is σ = 340955026422. Its totient is φ = 340955026420.

The previous prime is 340955026333. The next prime is 340955026453. The reversal of 340955026421 is 124620559043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222609394225 + 118345632196 = 471815^2 + 344014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340955026421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340955029421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170477513210 + 170477513211.

It is an arithmetic number, because the mean of its divisors is an integer number (170477513211).

Almost surely, 2^340955026421 is an apocalyptic number.

It is an amenable number.

340955026421 is a deficient number, since it is larger than the sum of its proper divisors (1).

340955026421 is an equidigital number, since it uses as much as digits as its factorization.

340955026421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 340955026421 in words is "three hundred forty billion, nine hundred fifty-five million, twenty-six thousand, four hundred twenty-one".