30349831 has 2 divisors, whose sum is σ = 30349832. Its totient is φ = 30349830.

The previous prime is 30349807. The next prime is 30349841. The reversal of 30349831 is 13894303.

It is a strong prime.

It is an emirp because it is prime and its reverse (13894303) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30349831 is a prime.

It is a super-2 number, since 2×30349831² = 1842224483457122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30349793 and 30349802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30349841) 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, 15174915 + 15174916.

It is an arithmetic number, because the mean of its divisors is an integer number (15174916).

Almost surely, 2^30349831 is an apocalyptic number.

30349831 is a deficient number, since it is larger than the sum of its proper divisors (1).

30349831 is an equidigital number, since it uses as much as digits as its factorization.

30349831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 30349831 is about 5509.0680700097. The cubic root of 30349831 is about 311.9263708296.

The spelling of 30349831 in words is "thirty million, three hundred forty-nine thousand, eight hundred thirty-one".