340244287 has 2 divisors, whose sum is σ = 340244288. Its totient is φ = 340244286.

The previous prime is 340244279. The next prime is 340244293. The reversal of 340244287 is 782442043.

It is a strong prime.

It is an emirp because it is prime and its reverse (782442043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340244287 - 2³ = 340244279 is a prime.

It is a super-2 number, since 2×340244287² = 231532349672276738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340244207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170122143 + 170122144.

It is an arithmetic number, because the mean of its divisors is an integer number (170122144).

Almost surely, 2^340244287 is an apocalyptic number.

340244287 is a deficient number, since it is larger than the sum of its proper divisors (1).

340244287 is an equidigital number, since it uses as much as digits as its factorization.

340244287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 34.

The square root of 340244287 is about 18445.7118865063. The cubic root of 340244287 is about 698.1203224128.

The spelling of 340244287 in words is "three hundred forty million, two hundred forty-four thousand, two hundred eighty-seven".