346306981 has 2 divisors, whose sum is σ = 346306982. Its totient is φ = 346306980.

The previous prime is 346306979. The next prime is 346306997. The reversal of 346306981 is 189603643.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346294881 + 12100 = 18609^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 346306981 - 2¹ = 346306979 is a prime.

It is a super-2 number, since 2×346306981² = 239857050178668722, which contains 22 as substring.

Together with 346306979, 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 (346307981) 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, 173153490 + 173153491.

It is an arithmetic number, because the mean of its divisors is an integer number (173153491).

Almost surely, 2^346306981 is an apocalyptic number.

It is an amenable number.

346306981 is a deficient number, since it is larger than the sum of its proper divisors (1).

346306981 is an equidigital number, since it uses as much as digits as its factorization.

346306981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 346306981 is about 18609.3251086653. The cubic root of 346306981 is about 702.2424555436.

The spelling of 346306981 in words is "three hundred forty-six million, three hundred six thousand, nine hundred eighty-one".