342509391 has 20 divisors (see below), whose sum is σ = 584743632. Its totient is φ = 195719328.

The previous prime is 342509383. The next prime is 342509411. The reversal of 342509391 is 193905243.

It is a happy number.

It is not a de Polignac number, because 342509391 - 2³ = 342509383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (342509381) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 301470 + ... + 302603.

Almost surely, 2^342509391 is an apocalyptic number.

342509391 is a deficient number, since it is larger than the sum of its proper divisors (242234241).

342509391 is an equidigital number, since it uses as much as digits as its factorization.

342509391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604092 (or 604083 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 342509391 is about 18507.0092397448. The cubic root of 342509391 is about 699.6660931294. Note that the first 3 decimals are identical.

The spelling of 342509391 in words is "three hundred forty-two million, five hundred nine thousand, three hundred ninety-one".