30971000729 has 2 divisors, whose sum is σ = 30971000730. Its totient is φ = 30971000728.

The previous prime is 30971000677. The next prime is 30971000737. The reversal of 30971000729 is 92700017903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19144873225 + 11826127504 = 138365^2 + 108748^2 .

It is a cyclic number.

It is not a de Polignac number, because 30971000729 - 2²⁴ = 30954223513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30971000692 and 30971000701.

It is not a weakly prime, because it can be changed into another prime (30971000329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15485500364 + 15485500365.

It is an arithmetic number, because the mean of its divisors is an integer number (15485500365).

Almost surely, 2^30971000729 is an apocalyptic number.

It is an amenable number.

30971000729 is a deficient number, since it is larger than the sum of its proper divisors (1).

30971000729 is an equidigital number, since it uses as much as digits as its factorization.

30971000729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23814, while the sum is 38.

The spelling of 30971000729 in words is "thirty billion, nine hundred seventy-one million, seven hundred twenty-nine", and thus it is an aban number.