30981029 has 2 divisors, whose sum is σ = 30981030. Its totient is φ = 30981028.

The previous prime is 30980993. The next prime is 30981031. The reversal of 30981029 is 92018903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26030404 + 4950625 = 5102^2 + 2225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30981029 is a prime.

Together with 30981031, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30980986 and 30981004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30981329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15490514 + 15490515.

It is an arithmetic number, because the mean of its divisors is an integer number (15490515).

Almost surely, 2^30981029 is an apocalyptic number.

It is an amenable number.

30981029 is a deficient number, since it is larger than the sum of its proper divisors (1).

30981029 is an equidigital number, since it uses as much as digits as its factorization.

30981029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 30981029 is about 5566.0604560138. The cubic root of 30981029 is about 314.0739713754.

The spelling of 30981029 in words is "thirty million, nine hundred eighty-one thousand, twenty-nine".