30311929 has 2 divisors, whose sum is σ = 30311930. Its totient is φ = 30311928.

The previous prime is 30311927. The next prime is 30311933. The reversal of 30311929 is 92911303.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16621929 + 13690000 = 4077^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 30311929 - 2¹ = 30311927 is a prime.

Together with 30311927, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 30311897 and 30311906.

It is not a weakly prime, because it can be changed into another prime (30311921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15155964 + 15155965.

It is an arithmetic number, because the mean of its divisors is an integer number (15155965).

Almost surely, 2^30311929 is an apocalyptic number.

It is an amenable number.

30311929 is a deficient number, since it is larger than the sum of its proper divisors (1).

30311929 is an equidigital number, since it uses as much as digits as its factorization.

30311929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 30311929 is about 5505.6270305933. The cubic root of 30311929 is about 311.7964683134.

The spelling of 30311929 in words is "thirty million, three hundred eleven thousand, nine hundred twenty-nine".