30902129 has 2 divisors, whose sum is σ = 30902130. Its totient is φ = 30902128.

The previous prime is 30902119. The next prime is 30902143. The reversal of 30902129 is 92120903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27804529 + 3097600 = 5273^2 + 1760^2 .

It is a cyclic number.

It is not a de Polignac number, because 30902129 - 2⁸ = 30901873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30902098 and 30902107.

It is not a weakly prime, because it can be changed into another prime (30902119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15451064 + 15451065.

It is an arithmetic number, because the mean of its divisors is an integer number (15451065).

Almost surely, 2^30902129 is an apocalyptic number.

It is an amenable number.

30902129 is a deficient number, since it is larger than the sum of its proper divisors (1).

30902129 is an equidigital number, since it uses as much as digits as its factorization.

30902129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 30902129 is about 5558.9683395393. The cubic root of 30902129 is about 313.8071252524.

The spelling of 30902129 in words is "thirty million, nine hundred two thousand, one hundred twenty-nine".