30911113 has 2 divisors, whose sum is σ = 30911114. Its totient is φ = 30911112.

The previous prime is 30911051. The next prime is 30911131. The reversal of 30911113 is 31111903.

It is a happy number.

Together with next prime (30911131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30338064 + 573049 = 5508^2 + 757^2 .

It is an emirp because it is prime and its reverse (31111903) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30911113 is a prime.

It is not a weakly prime, because it can be changed into another prime (30911183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15455556 + 15455557.

It is an arithmetic number, because the mean of its divisors is an integer number (15455557).

Almost surely, 2^30911113 is an apocalyptic number.

It is an amenable number.

30911113 is a deficient number, since it is larger than the sum of its proper divisors (1).

30911113 is an equidigital number, since it uses as much as digits as its factorization.

30911113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 30911113 is about 5559.7763444225. The cubic root of 30911113 is about 313.8375327587.

It can be divided in two parts, 30911 and 113, that multiplied together give a palindrome (3492943).

The spelling of 30911113 in words is "thirty million, nine hundred eleven thousand, one hundred thirteen".