30780903 has 4 divisors (see below), whose sum is σ = 41041208. Its totient is φ = 20520600.

The previous prime is 30780901. The next prime is 30780907. The reversal of 30780903 is 30908703.

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

It is not a de Polignac number, because 30780903 - 2¹ = 30780901 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 (30780901) 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 3 ways as a sum of consecutive naturals, for example, 5130148 + ... + 5130153.

It is an arithmetic number, because the mean of its divisors is an integer number (10260302).

Almost surely, 2^30780903 is an apocalyptic number.

30780903 is a deficient number, since it is larger than the sum of its proper divisors (10260305).

30780903 is a wasteful number, since it uses less digits than its factorization.

30780903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10260304.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 30780903 is about 5548.0539831548. The cubic root of 30780903 is about 313.3962427128.

The spelling of 30780903 in words is "thirty million, seven hundred eighty thousand, nine hundred three".