30725389 has 4 divisors (see below), whose sum is σ = 30761856. Its totient is φ = 30688924.

The previous prime is 30725377. The next prime is 30725393. The reversal of 30725389 is 98352703.

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.

It is a cyclic number.

It is not a de Polignac number, because 30725389 - 2⁹ = 30724877 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 (30725339) 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, 16939 + ... + 18664.

It is an arithmetic number, because the mean of its divisors is an integer number (7690464).

Almost surely, 2^30725389 is an apocalyptic number.

It is an amenable number.

30725389 is a deficient number, since it is larger than the sum of its proper divisors (36467).

30725389 is an equidigital number, since it uses as much as digits as its factorization.

30725389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36466.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 30725389 is about 5543.0487098708. The cubic root of 30725389 is about 313.2077237833.

The spelling of 30725389 in words is "thirty million, seven hundred twenty-five thousand, three hundred eighty-nine".