340341247 has 2 divisors, whose sum is σ = 340341248. Its totient is φ = 340341246.

The previous prime is 340341223. The next prime is 340341263. The reversal of 340341247 is 742143043.

It is a strong prime.

It is an emirp because it is prime and its reverse (742143043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340341247 - 2¹⁹ = 339816959 is a prime.

It is equal to p_18312148 and since 340341247 and 18312148 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340341047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170170623 + 170170624.

It is an arithmetic number, because the mean of its divisors is an integer number (170170624).

Almost surely, 2^340341247 is an apocalyptic number.

340341247 is a deficient number, since it is larger than the sum of its proper divisors (1).

340341247 is an equidigital number, since it uses as much as digits as its factorization.

340341247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 340341247 is about 18448.3399524185. The cubic root of 340341247 is about 698.1866309644.

The spelling of 340341247 in words is "three hundred forty million, three hundred forty-one thousand, two hundred forty-seven".