30847493 has 2 divisors, whose sum is σ = 30847494. Its totient is φ = 30847492.

The previous prime is 30847483. The next prime is 30847499. The reversal of 30847493 is 39474803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29833444 + 1014049 = 5462^2 + 1007^2 .

It is an emirp because it is prime and its reverse (39474803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30847493 - 2⁴ = 30847477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30847499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15423746 + 15423747.

It is an arithmetic number, because the mean of its divisors is an integer number (15423747).

Almost surely, 2^30847493 is an apocalyptic number.

It is an amenable number.

30847493 is a deficient number, since it is larger than the sum of its proper divisors (1).

30847493 is an equidigital number, since it uses as much as digits as its factorization.

30847493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 30847493 is about 5554.0519443016. The cubic root of 30847493 is about 313.6220756458.

The spelling of 30847493 in words is "thirty million, eight hundred forty-seven thousand, four hundred ninety-three".