30712397 has 2 divisors, whose sum is σ = 30712398. Its totient is φ = 30712396.

The previous prime is 30712393. The next prime is 30712433. The reversal of 30712397 is 79321703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19193161 + 11519236 = 4381^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 30712397 - 2² = 30712393 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30712393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15356198 + 15356199.

It is an arithmetic number, because the mean of its divisors is an integer number (15356199).

Almost surely, 2^30712397 is an apocalyptic number.

It is an amenable number.

30712397 is a deficient number, since it is larger than the sum of its proper divisors (1).

30712397 is an equidigital number, since it uses as much as digits as its factorization.

30712397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 30712397 is about 5541.8766677002. The cubic root of 30712397 is about 313.1635717149.

The spelling of 30712397 in words is "thirty million, seven hundred twelve thousand, three hundred ninety-seven".