346140391 has 2 divisors, whose sum is σ = 346140392. Its totient is φ = 346140390.

The previous prime is 346140371. The next prime is 346140419. The reversal of 346140391 is 193041643.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 346140391 - 2⁵ = 346140359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346140331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173070195 + 173070196.

It is an arithmetic number, because the mean of its divisors is an integer number (173070196).

Almost surely, 2^346140391 is an apocalyptic number.

346140391 is a deficient number, since it is larger than the sum of its proper divisors (1).

346140391 is an equidigital number, since it uses as much as digits as its factorization.

346140391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 346140391 is about 18604.8485884728. The cubic root of 346140391 is about 702.1298335630.

The spelling of 346140391 in words is "three hundred forty-six million, one hundred forty thousand, three hundred ninety-one".