340356953 has 2 divisors, whose sum is σ = 340356954. Its totient is φ = 340356952.

The previous prime is 340356931. The next prime is 340357001. The reversal of 340356953 is 359653043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325549849 + 14807104 = 18043^2 + 3848^2 .

It is a cyclic number.

It is not a de Polignac number, because 340356953 - 2⁸ = 340356697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (340356923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170178476 + 170178477.

It is an arithmetic number, because the mean of its divisors is an integer number (170178477).

Almost surely, 2^340356953 is an apocalyptic number.

It is an amenable number.

340356953 is a deficient number, since it is larger than the sum of its proper divisors (1).

340356953 is an equidigital number, since it uses as much as digits as its factorization.

340356953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 38.

The square root of 340356953 is about 18448.7656226643. The cubic root of 340356953 is about 698.1973707250.

The spelling of 340356953 in words is "three hundred forty million, three hundred fifty-six thousand, nine hundred fifty-three".