30317989 has 4 divisors (see below), whose sum is σ = 32650156. Its totient is φ = 27985824.

The previous prime is 30317941. The next prime is 30317993. The reversal of 30317989 is 98971303.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1481089 + 28836900 = 1217^2 + 5370^2 .

It is a cyclic number.

It is not a de Polignac number, because 30317989 - 2¹¹ = 30315941 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 (30317929) 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, 1166064 + ... + 1166089.

It is an arithmetic number, because the mean of its divisors is an integer number (8162539).

Almost surely, 2^30317989 is an apocalyptic number.

It is an amenable number.

30317989 is a deficient number, since it is larger than the sum of its proper divisors (2332167).

30317989 is a wasteful number, since it uses less digits than its factorization.

30317989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332166.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 30317989 is about 5506.1773491234. The cubic root of 30317989 is about 311.8172451798.

The spelling of 30317989 in words is "thirty million, three hundred seventeen thousand, nine hundred eighty-nine".