349740647 has 2 divisors, whose sum is σ = 349740648. Its totient is φ = 349740646.

The previous prime is 349740631. The next prime is 349740649. The reversal of 349740647 is 746047943.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 349740647 - 2⁴ = 349740631 is a prime.

Together with 349740649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 349740598 and 349740607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349740649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174870323 + 174870324.

It is an arithmetic number, because the mean of its divisors is an integer number (174870324).

Almost surely, 2^349740647 is an apocalyptic number.

349740647 is a deficient number, since it is larger than the sum of its proper divisors (1).

349740647 is an equidigital number, since it uses as much as digits as its factorization.

349740647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 508032, while the sum is 44.

The square root of 349740647 is about 18701.3541488310. The cubic root of 349740647 is about 704.5557599007. Note that the first 3 decimals are identical.

It can be divided in two parts, 3497 and 40647, that added together give a palindrome (44144).

The spelling of 349740647 in words is "three hundred forty-nine million, seven hundred forty thousand, six hundred forty-seven".