30372989 has 8 divisors (see below), whose sum is σ = 30703992. Its totient is φ = 30044160.

The previous prime is 30372983. The next prime is 30372997. The reversal of 30372989 is 98927303.

It can be written as a sum of positive squares in 4 ways, for example, as 1836025 + 28536964 = 1355^2 + 5342^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30372989 - 2⁸ = 30372733 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 (30372983) 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 7 ways as a sum of consecutive naturals, for example, 46187 + ... + 46839.

It is an arithmetic number, because the mean of its divisors is an integer number (3837999).

Almost surely, 2^30372989 is an apocalyptic number.

It is an amenable number.

30372989 is a deficient number, since it is larger than the sum of its proper divisors (331003).

30372989 is a wasteful number, since it uses less digits than its factorization.

30372989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 30372989 is about 5511.1694766175. The cubic root of 30372989 is about 312.0056876292.

The spelling of 30372989 in words is "thirty million, three hundred seventy-two thousand, nine hundred eighty-nine".