345460781 has 2 divisors, whose sum is σ = 345460782. Its totient is φ = 345460780.

The previous prime is 345460699. The next prime is 345460783. The reversal of 345460781 is 187064543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227738281 + 117722500 = 15091^2 + 10850^2 .

It is a cyclic number.

It is not a de Polignac number, because 345460781 - 2¹⁰ = 345459757 is a prime.

It is a super-2 number, since 2×345460781² = 238686302418259922, which contains 22 as substring.

Together with 345460783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345460783) 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, 172730390 + 172730391.

It is an arithmetic number, because the mean of its divisors is an integer number (172730391).

Almost surely, 2^345460781 is an apocalyptic number.

It is an amenable number.

345460781 is a deficient number, since it is larger than the sum of its proper divisors (1).

345460781 is an equidigital number, since it uses as much as digits as its factorization.

345460781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 345460781 is about 18586.5752897084. The cubic root of 345460781 is about 701.6700133055.

The spelling of 345460781 in words is "three hundred forty-five million, four hundred sixty thousand, seven hundred eighty-one".