340857761 has 2 divisors, whose sum is σ = 340857762. Its totient is φ = 340857760.

The previous prime is 340857719. The next prime is 340857763. The reversal of 340857761 is 167758043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 301230736 + 39627025 = 17356^2 + 6295^2 .

It is an emirp because it is prime and its reverse (167758043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340857761 - 2⁶ = 340857697 is a prime.

It is a Sophie Germain prime.

Together with 340857763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (340857763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170428880 + 170428881.

It is an arithmetic number, because the mean of its divisors is an integer number (170428881).

Almost surely, 2^340857761 is an apocalyptic number.

It is an amenable number.

340857761 is a deficient number, since it is larger than the sum of its proper divisors (1).

340857761 is an equidigital number, since it uses as much as digits as its factorization.

340857761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 340857761 is about 18462.3335740637. Note that the first 3 decimals coincide. The cubic root of 340857761 is about 698.5396500737.

The spelling of 340857761 in words is "three hundred forty million, eight hundred fifty-seven thousand, seven hundred sixty-one".