30797729 has 2 divisors, whose sum is σ = 30797730. Its totient is φ = 30797728.

The previous prime is 30797719. The next prime is 30797743. The reversal of 30797729 is 92779703.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30547729 + 250000 = 5527^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 30797729 - 2¹⁶ = 30732193 is a prime.

It is a super-2 number, since 2×30797729² = 1897000223114882, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30797729.

It is not a weakly prime, because it can be changed into another prime (30797719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15398864 + 15398865.

It is an arithmetic number, because the mean of its divisors is an integer number (15398865).

Almost surely, 2^30797729 is an apocalyptic number.

It is an amenable number.

30797729 is a deficient number, since it is larger than the sum of its proper divisors (1).

30797729 is an equidigital number, since it uses as much as digits as its factorization.

30797729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 166698, while the sum is 44.

The square root of 30797729 is about 5549.5701635352. The cubic root of 30797729 is about 313.4533370377.

The spelling of 30797729 in words is "thirty million, seven hundred ninety-seven thousand, seven hundred twenty-nine".