343608781 has 2 divisors, whose sum is σ = 343608782. Its totient is φ = 343608780.

The previous prime is 343608773. The next prime is 343608803. The reversal of 343608781 is 187806343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277755556 + 65853225 = 16666^2 + 8115^2 .

It is a cyclic number.

It is not a de Polignac number, because 343608781 - 2³ = 343608773 is a prime.

It is a super-2 number, since 2×343608781² = 236133988760611922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (343608701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171804390 + 171804391.

It is an arithmetic number, because the mean of its divisors is an integer number (171804391).

Almost surely, 2^343608781 is an apocalyptic number.

It is an amenable number.

343608781 is a deficient number, since it is larger than the sum of its proper divisors (1).

343608781 is an equidigital number, since it uses as much as digits as its factorization.

343608781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 343608781 is about 18536.6874333037. The cubic root of 343608781 is about 700.4138919628.

The spelling of 343608781 in words is "three hundred forty-three million, six hundred eight thousand, seven hundred eighty-one".