344407856987 has 2 divisors, whose sum is σ = 344407856988. Its totient is φ = 344407856986.

The previous prime is 344407856963. The next prime is 344407857049. The reversal of 344407856987 is 789658704443.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 344407856987 - 2¹² = 344407852891 is a prime.

It is not a weakly prime, because it can be changed into another prime (344407856957) 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, 172203928493 + 172203928494.

It is an arithmetic number, because the mean of its divisors is an integer number (172203928494).

Almost surely, 2^344407856987 is an apocalyptic number.

344407856987 is a deficient number, since it is larger than the sum of its proper divisors (1).

344407856987 is an equidigital number, since it uses as much as digits as its factorization.

344407856987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162570240, while the sum is 65.

The spelling of 344407856987 in words is "three hundred forty-four billion, four hundred seven million, eight hundred fifty-six thousand, nine hundred eighty-seven".