348991 has 2 divisors, whose sum is σ = 348992. Its totient is φ = 348990.

The previous prime is 348989. The next prime is 349007. The reversal of 348991 is 199843.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 348991 - 2¹ = 348989 is a prime.

Together with 348989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (348911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174495 + 174496.

It is an arithmetic number, because the mean of its divisors is an integer number (174496).

2³⁴⁸⁹⁹¹ is an apocalyptic number.

348991 is a deficient number, since it is larger than the sum of its proper divisors (1).

348991 is an equidigital number, since it uses as much as digits as its factorization.

348991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 348991 is about 590.7546021827. The cubic root of 348991 is about 70.4052009544.

It can be divided in two parts, 34 and 8991, that added together give a square (9025 = 95²).

The spelling of 348991 in words is "three hundred forty-eight thousand, nine hundred ninety-one".