30679989 has 4 divisors (see below), whose sum is σ = 40906656. Its totient is φ = 20453324.

The previous prime is 30679973. The next prime is 30679997. The reversal of 30679989 is 98997603.

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: 98997603 = 3 ⋅32999201.

It is a cyclic number.

It is not a de Polignac number, because 30679989 - 2⁴ = 30679973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30679969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5113329 + ... + 5113334.

It is an arithmetic number, because the mean of its divisors is an integer number (10226664).

Almost surely, 2^30679989 is an apocalyptic number.

It is an amenable number.

30679989 is a deficient number, since it is larger than the sum of its proper divisors (10226667).

30679989 is a wasteful number, since it uses less digits than its factorization.

30679989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10226666.

The product of its (nonzero) digits is 734832, while the sum is 51.

The square root of 30679989 is about 5538.9519766830. The cubic root of 30679989 is about 313.0533819339.

The spelling of 30679989 in words is "thirty million, six hundred seventy-nine thousand, nine hundred eighty-nine".