340644961 has 2 divisors, whose sum is σ = 340644962. Its totient is φ = 340644960.

The previous prime is 340644959. The next prime is 340644971. The reversal of 340644961 is 169446043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340623936 + 21025 = 18456^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 340644961 - 2¹ = 340644959 is a prime.

Together with 340644959, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 340644961.

It is not a weakly prime, because it can be changed into another prime (340644911) 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, 170322480 + 170322481.

It is an arithmetic number, because the mean of its divisors is an integer number (170322481).

Almost surely, 2^340644961 is an apocalyptic number.

It is an amenable number.

340644961 is a deficient number, since it is larger than the sum of its proper divisors (1).

340644961 is an equidigital number, since it uses as much as digits as its factorization.

340644961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 340644961 is about 18456.5695891734. The cubic root of 340644961 is about 698.3942520030.

The spelling of 340644961 in words is "three hundred forty million, six hundred forty-four thousand, nine hundred sixty-one".