340447259209829 has 2 divisors, whose sum is σ = 340447259209830. Its totient is φ = 340447259209828.

The previous prime is 340447259209793. The next prime is 340447259209843. The reversal of 340447259209829 is 928902952744043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 306274150476100 + 34173108733729 = 17500690^2 + 5845777^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340447259209829 is a prime.

It is a super-2 number, since 2×340447259209829² (a number of 30 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340447259209859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170223629604914 + 170223629604915.

It is an arithmetic number, because the mean of its divisors is an integer number (170223629604915).

Almost surely, 2^{340447259209829} is an apocalyptic number.

It is an amenable number.

340447259209829 is a deficient number, since it is larger than the sum of its proper divisors (1).

340447259209829 is an equidigital number, since it uses as much as digits as its factorization.

340447259209829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 313528320, while the sum is 68.

The spelling of 340447259209829 in words is "three hundred forty trillion, four hundred forty-seven billion, two hundred fifty-nine million, two hundred nine thousand, eight hundred twenty-nine".