340635289 has 2 divisors, whose sum is σ = 340635290. Its totient is φ = 340635288.

The previous prime is 340635259. The next prime is 340635299. The reversal of 340635289 is 982536043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337089600 + 3545689 = 18360^2 + 1883^2 .

It is an emirp because it is prime and its reverse (982536043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340635289 is a prime.

It is a super-2 number, since 2×340635289² = 232064800224227042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340635259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170317644 + 170317645.

It is an arithmetic number, because the mean of its divisors is an integer number (170317645).

Almost surely, 2^340635289 is an apocalyptic number.

It is an amenable number.

340635289 is a deficient number, since it is larger than the sum of its proper divisors (1).

340635289 is an equidigital number, since it uses as much as digits as its factorization.

340635289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 40.

The square root of 340635289 is about 18456.3075667914. The cubic root of 340635289 is about 698.3876420582.

The spelling of 340635289 in words is "three hundred forty million, six hundred thirty-five thousand, two hundred eighty-nine".