345788761 has 2 divisors, whose sum is σ = 345788762. Its totient is φ = 345788760.

The previous prime is 345788759. The next prime is 345788803. The reversal of 345788761 is 167887543.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299290000 + 46498761 = 17300^2 + 6819^2 .

It is a cyclic number.

It is not a de Polignac number, because 345788761 - 2¹ = 345788759 is a prime.

Together with 345788759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (345788731) 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, 172894380 + 172894381.

It is an arithmetic number, because the mean of its divisors is an integer number (172894381).

Almost surely, 2^345788761 is an apocalyptic number.

It is an amenable number.

345788761 is a deficient number, since it is larger than the sum of its proper divisors (1).

345788761 is an equidigital number, since it uses as much as digits as its factorization.

345788761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 49.

The square root of 345788761 is about 18595.3962313256. The cubic root of 345788761 is about 701.8919979248.

The spelling of 345788761 in words is "three hundred forty-five million, seven hundred eighty-eight thousand, seven hundred sixty-one".