30873889 has 4 divisors (see below), whose sum is σ = 32216256. Its totient is φ = 29531524.

The previous prime is 30873883. The next prime is 30873901. The reversal of 30873889 is 98837803.

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: 98837803 = 59 ⋅1675217.

It is a cyclic number.

It is not a de Polignac number, because 30873889 - 2⁷ = 30873761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30873883) 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, 671149 + ... + 671194.

It is an arithmetic number, because the mean of its divisors is an integer number (8054064).

Almost surely, 2^30873889 is an apocalyptic number.

It is an amenable number.

30873889 is a deficient number, since it is larger than the sum of its proper divisors (1342367).

30873889 is a wasteful number, since it uses less digits than its factorization.

30873889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342366.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 30873889 is about 5556.4277193175. The cubic root of 30873889 is about 313.7115049357.

The spelling of 30873889 in words is "thirty million, eight hundred seventy-three thousand, eight hundred eighty-nine".