340149509 has 4 divisors (see below), whose sum is σ = 388742304. Its totient is φ = 291556716.

The previous prime is 340149451. The next prime is 340149529. The reversal of 340149509 is 905941043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 340149509 - 2⁸ = 340149253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340149529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24296387 + ... + 24296400.

It is an arithmetic number, because the mean of its divisors is an integer number (97185576).

Almost surely, 2^340149509 is an apocalyptic number.

It is an amenable number.

340149509 is a deficient number, since it is larger than the sum of its proper divisors (48592795).

340149509 is an equidigital number, since it uses as much as digits as its factorization.

340149509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48592794.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 340149509 is about 18443.1426009777. The cubic root of 340149509 is about 698.0554939007.

The spelling of 340149509 in words is "three hundred forty million, one hundred forty-nine thousand, five hundred nine".