328689901 has 4 divisors (see below), whose sum is σ = 330658272. Its totient is φ = 326721532.

The previous prime is 328689887. The next prime is 328689937. The reversal of 328689901 is 109986823.

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: 109986823 = 89 ⋅1235807.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328689901 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 (328689961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 983935 + ... + 984268.

It is an arithmetic number, because the mean of its divisors is an integer number (82664568).

Almost surely, 2^328689901 is an apocalyptic number.

It is an amenable number.

328689901 is a deficient number, since it is larger than the sum of its proper divisors (1968371).

328689901 is a wasteful number, since it uses less digits than its factorization.

328689901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968370.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 328689901 is about 18129.8069763580. The cubic root of 328689901 is about 690.1266315231.

The spelling of 328689901 in words is "three hundred twenty-eight million, six hundred eighty-nine thousand, nine hundred one".