343402009 has 2 divisors, whose sum is σ = 343402010. Its totient is φ = 343402008.

The previous prime is 343401977. The next prime is 343402061. The reversal of 343402009 is 900204343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207446409 + 135955600 = 14403^2 + 11660^2 .

It is an emirp because it is prime and its reverse (900204343) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 343402009 - 2⁵ = 343401977 is a prime.

It is not a weakly prime, because it can be changed into another prime (343402099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171701004 + 171701005.

It is an arithmetic number, because the mean of its divisors is an integer number (171701005).

Almost surely, 2^343402009 is an apocalyptic number.

It is an amenable number.

343402009 is a deficient number, since it is larger than the sum of its proper divisors (1).

343402009 is an equidigital number, since it uses as much as digits as its factorization.

343402009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 343402009 is about 18531.1092220622. The cubic root of 343402009 is about 700.2733687385.

It can be divided in two parts, 34 and 3402009, that added together give a palindrome (3402043).

The spelling of 343402009 in words is "three hundred forty-three million, four hundred two thousand, nine".