30193931 has 2 divisors, whose sum is σ = 30193932. Its totient is φ = 30193930.

The previous prime is 30193913. The next prime is 30193937. The reversal of 30193931 is 13939103.

Together with previous prime (30193913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30193931 - 2¹⁰ = 30192907 is a prime.

It is a super-2 number, since 2×30193931² = 1823346938465522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30193894 and 30193903.

It is not a weakly prime, because it can be changed into another prime (30193937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15096965 + 15096966.

It is an arithmetic number, because the mean of its divisors is an integer number (15096966).

Almost surely, 2^30193931 is an apocalyptic number.

30193931 is a deficient number, since it is larger than the sum of its proper divisors (1).

30193931 is an equidigital number, since it uses as much as digits as its factorization.

30193931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 29.

The square root of 30193931 is about 5494.9004540574. The cubic root of 30193931 is about 311.3913560385.

The spelling of 30193931 in words is "thirty million, one hundred ninety-three thousand, nine hundred thirty-one".