329470509 has 4 divisors (see below), whose sum is σ = 439294016. Its totient is φ = 219647004.

The previous prime is 329470487. The next prime is 329470543. The reversal of 329470509 is 905074923.

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, and also an emirpimes, since its reverse is a distinct semiprime: 905074923 = 3 ⋅301691641.

It is not a de Polignac number, because 329470509 - 2¹² = 329466413 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329470549) 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, 54911749 + ... + 54911754.

It is an arithmetic number, because the mean of its divisors is an integer number (109823504).

Almost surely, 2^329470509 is an apocalyptic number.

It is an amenable number.

329470509 is a deficient number, since it is larger than the sum of its proper divisors (109823507).

329470509 is a wasteful number, since it uses less digits than its factorization.

329470509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109823506.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 329470509 is about 18151.3225138005. The cubic root of 329470509 is about 690.6725284927.

The spelling of 329470509 in words is "three hundred twenty-nine million, four hundred seventy thousand, five hundred nine".