30725393 has 2 divisors, whose sum is σ = 30725394. Its totient is φ = 30725392.

The previous prime is 30725377. The next prime is 30725411. The reversal of 30725393 is 39352703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18939904 + 11785489 = 4352^2 + 3433^2 .

It is a cyclic number.

It is not a de Polignac number, because 30725393 - 2⁴ = 30725377 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (30725333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15362696 + 15362697.

It is an arithmetic number, because the mean of its divisors is an integer number (15362697).

Almost surely, 2^30725393 is an apocalyptic number.

It is an amenable number.

30725393 is a deficient number, since it is larger than the sum of its proper divisors (1).

30725393 is an equidigital number, since it uses as much as digits as its factorization.

30725393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17010, while the sum is 32.

The square root of 30725393 is about 5543.0490706830. The cubic root of 30725393 is about 313.2077373750.

The spelling of 30725393 in words is "thirty million, seven hundred twenty-five thousand, three hundred ninety-three".