30909797 has 2 divisors, whose sum is σ = 30909798. Its totient is φ = 30909796.

The previous prime is 30909793. The next prime is 30909817. The reversal of 30909797 is 79790903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27520516 + 3389281 = 5246^2 + 1841^2 .

It is a cyclic number.

It is not a de Polignac number, because 30909797 - 2² = 30909793 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30909793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15454898 + 15454899.

It is an arithmetic number, because the mean of its divisors is an integer number (15454899).

Almost surely, 2^30909797 is an apocalyptic number.

It is an amenable number.

30909797 is a deficient number, since it is larger than the sum of its proper divisors (1).

30909797 is an equidigital number, since it uses as much as digits as its factorization.

30909797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107163, while the sum is 44.

The square root of 30909797 is about 5559.6579930784. The cubic root of 30909797 is about 313.8330789554.

The spelling of 30909797 in words is "thirty million, nine hundred nine thousand, seven hundred ninety-seven".