30974893 has 2 divisors, whose sum is σ = 30974894. Its totient is φ = 30974892.

The previous prime is 30974891. The next prime is 30974917. The reversal of 30974893 is 39847903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23011209 + 7963684 = 4797^2 + 2822^2 .

It is an emirp because it is prime and its reverse (39847903) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30974893 - 2¹ = 30974891 is a prime.

It is a super-2 number, since 2×30974893² = 1918887992722898, which contains 22 as substring.

Together with 30974891, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30974891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15487446 + 15487447.

It is an arithmetic number, because the mean of its divisors is an integer number (15487447).

Almost surely, 2^30974893 is an apocalyptic number.

It is an amenable number.

30974893 is a deficient number, since it is larger than the sum of its proper divisors (1).

30974893 is an equidigital number, since it uses as much as digits as its factorization.

30974893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 43.

The square root of 30974893 is about 5565.5092309689. The cubic root of 30974893 is about 314.0532351895.

The spelling of 30974893 in words is "thirty million, nine hundred seventy-four thousand, eight hundred ninety-three".