30970725 has 12 divisors (see below), whose sum is σ = 51205056. Its totient is φ = 16517680.

The previous prime is 30970721. The next prime is 30970727. The reversal of 30970725 is 52707903.

It is not a de Polignac number, because 30970725 - 2² = 30970721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30970721) 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 11 ways as a sum of consecutive naturals, for example, 206397 + ... + 206546.

It is an arithmetic number, because the mean of its divisors is an integer number (4267088).

Almost surely, 2^30970725 is an apocalyptic number.

It is an amenable number.

30970725 is a deficient number, since it is larger than the sum of its proper divisors (20234331).

30970725 is a wasteful number, since it uses less digits than its factorization.

30970725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412956 (or 412951 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 30970725 is about 5565.1347692576. The cubic root of 30970725 is about 314.0391481610.

The spelling of 30970725 in words is "thirty million, nine hundred seventy thousand, seven hundred twenty-five".