340352261 has 2 divisors, whose sum is σ = 340352262. Its totient is φ = 340352260.

The previous prime is 340352237. The next prime is 340352281. The reversal of 340352261 is 162253043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219484225 + 120868036 = 14815^2 + 10994^2 .

It is a cyclic number.

It is not a de Polignac number, because 340352261 - 2⁶ = 340352197 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 340352261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340352281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170176130 + 170176131.

It is an arithmetic number, because the mean of its divisors is an integer number (170176131).

Almost surely, 2^340352261 is an apocalyptic number.

It is an amenable number.

340352261 is a deficient number, since it is larger than the sum of its proper divisors (1).

340352261 is an equidigital number, since it uses as much as digits as its factorization.

340352261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 340352261 is about 18448.6384592468. The cubic root of 340352261 is about 698.1941623707.

The spelling of 340352261 in words is "three hundred forty million, three hundred fifty-two thousand, two hundred sixty-one".