30730925 has 6 divisors (see below), whose sum is σ = 38106378. Its totient is φ = 24584720.

The previous prime is 30730913. The next prime is 30730927. The reversal of 30730925 is 52903703.

It can be written as a sum of positive squares in 3 ways, for example, as 17161 + 30713764 = 131^2 + 5542^2 .

It is not a de Polignac number, because 30730925 - 2⁸ = 30730669 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 (30730927) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 614594 + ... + 614643.

It is an arithmetic number, because the mean of its divisors is an integer number (6351063).

Almost surely, 2^30730925 is an apocalyptic number.

It is an amenable number.

30730925 is a deficient number, since it is larger than the sum of its proper divisors (7375453).

30730925 is a wasteful number, since it uses less digits than its factorization.

30730925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229247 (or 1229242 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 30730925 is about 5543.5480515641. The cubic root of 30730925 is about 313.2265335677.

The spelling of 30730925 in words is "thirty million, seven hundred thirty thousand, nine hundred twenty-five".