349229731 has 2 divisors, whose sum is σ = 349229732. Its totient is φ = 349229730.

The previous prime is 349229729. The next prime is 349229743. The reversal of 349229731 is 137922943.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 349229731 - 2¹ = 349229729 is a prime.

It is a super-2 number, since 2×349229731² = 243922810028664722, which contains 22 as substring.

Together with 349229729, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349229761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174614865 + 174614866.

It is an arithmetic number, because the mean of its divisors is an integer number (174614866).

Almost surely, 2^349229731 is an apocalyptic number.

349229731 is a deficient number, since it is larger than the sum of its proper divisors (1).

349229731 is an equidigital number, since it uses as much as digits as its factorization.

349229731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 349229731 is about 18687.6892900112. The cubic root of 349229731 is about 704.2125110371.

The spelling of 349229731 in words is "three hundred forty-nine million, two hundred twenty-nine thousand, seven hundred thirty-one".