342503509 has 2 divisors, whose sum is σ = 342503510. Its totient is φ = 342503508.

The previous prime is 342503489. The next prime is 342503533. The reversal of 342503509 is 905305243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232715025 + 109788484 = 15255^2 + 10478^2 .

It is a cyclic number.

It is not a de Polignac number, because 342503509 - 2⁹ = 342502997 is a prime.

It is equal to p_18422257 and since 342503509 and 18422257 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 (342503569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171251754 + 171251755.

It is an arithmetic number, because the mean of its divisors is an integer number (171251755).

Almost surely, 2^342503509 is an apocalyptic number.

It is an amenable number.

342503509 is a deficient number, since it is larger than the sum of its proper divisors (1).

342503509 is an equidigital number, since it uses as much as digits as its factorization.

342503509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 342503509 is about 18506.8503262981. The cubic root of 342503509 is about 699.6620879258.

The spelling of 342503509 in words is "three hundred forty-two million, five hundred three thousand, five hundred nine".