30690925 has 6 divisors (see below), whose sum is σ = 38056778. Its totient is φ = 24552720.

The previous prime is 30690923. The next prime is 30690931. The reversal of 30690925 is 52909603.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10404 + 30680521 = 102^2 + 5539^2 .

It is not a de Polignac number, because 30690925 - 2¹ = 30690923 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 (30690923) 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, 613794 + ... + 613843.

Almost surely, 2^30690925 is an apocalyptic number.

It is an amenable number.

30690925 is a deficient number, since it is larger than the sum of its proper divisors (7365853).

30690925 is a wasteful number, since it uses less digits than its factorization.

30690925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227647 (or 1227642 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 30690925 is about 5539.9390790874. The cubic root of 30690925 is about 313.0905738756.

The spelling of 30690925 in words is "thirty million, six hundred ninety thousand, nine hundred twenty-five".