343450981 has 2 divisors, whose sum is σ = 343450982. Its totient is φ = 343450980.

The previous prime is 343450979. The next prime is 343451021. The reversal of 343450981 is 189054343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 283248900 + 60202081 = 16830^2 + 7759^2 .

It is an emirp because it is prime and its reverse (189054343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343450981 - 2¹ = 343450979 is a prime.

It is a super-2 number, since 2×343450981² = 235917152699724722, which contains 22 as substring.

Together with 343450979, it forms a pair of twin primes.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 343450981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343450381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171725490 + 171725491.

It is an arithmetic number, because the mean of its divisors is an integer number (171725491).

Almost surely, 2^343450981 is an apocalyptic number.

It is an amenable number.

343450981 is a deficient number, since it is larger than the sum of its proper divisors (1).

343450981 is an equidigital number, since it uses as much as digits as its factorization.

343450981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 343450981 is about 18532.4305205766. The cubic root of 343450981 is about 700.3066554369.

The spelling of 343450981 in words is "three hundred forty-three million, four hundred fifty thousand, nine hundred eighty-one".