346643221487 has 2 divisors, whose sum is σ = 346643221488. Its totient is φ = 346643221486.

The previous prime is 346643221411. The next prime is 346643221489. The reversal of 346643221487 is 784122346643.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 346643221487 - 2¹² = 346643217391 is a prime.

Together with 346643221489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346643221489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173321610743 + 173321610744.

It is an arithmetic number, because the mean of its divisors is an integer number (173321610744).

Almost surely, 2^346643221487 is an apocalyptic number.

346643221487 is a deficient number, since it is larger than the sum of its proper divisors (1).

346643221487 is an equidigital number, since it uses as much as digits as its factorization.

346643221487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 50.

The spelling of 346643221487 in words is "three hundred forty-six billion, six hundred forty-three million, two hundred twenty-one thousand, four hundred eighty-seven".