342509423 has 2 divisors, whose sum is σ = 342509424. Its totient is φ = 342509422.

The previous prime is 342509411. The next prime is 342509471. The reversal of 342509423 is 324905243.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-342509423 is a prime.

It is equal to p_18422555 and since 342509423 and 18422555 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 342509423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (342509023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171254711 + 171254712.

It is an arithmetic number, because the mean of its divisors is an integer number (171254712).

Almost surely, 2^342509423 is an apocalyptic number.

342509423 is a deficient number, since it is larger than the sum of its proper divisors (1).

342509423 is an equidigital number, since it uses as much as digits as its factorization.

342509423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 342509423 is about 18507.0101042821. The cubic root of 342509423 is about 699.6661149189. Note that the first 3 decimals are identical.

The spelling of 342509423 in words is "three hundred forty-two million, five hundred nine thousand, four hundred twenty-three".