30745997 has 2 divisors, whose sum is σ = 30745998. Its totient is φ = 30745996.

The previous prime is 30745991. The next prime is 30745999. The reversal of 30745997 is 79954703.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25110121 + 5635876 = 5011^2 + 2374^2 .

It is a cyclic number.

It is not a de Polignac number, because 30745997 - 2¹⁸ = 30483853 is a prime.

Together with 30745999, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30745991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15372998 + 15372999.

It is an arithmetic number, because the mean of its divisors is an integer number (15372999).

Almost surely, 2^30745997 is an apocalyptic number.

It is an amenable number.

30745997 is a deficient number, since it is larger than the sum of its proper divisors (1).

30745997 is an equidigital number, since it uses as much as digits as its factorization.

30745997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 30745997 is about 5544.9073031026. The cubic root of 30745997 is about 313.2777325768.

The spelling of 30745997 in words is "thirty million, seven hundred forty-five thousand, nine hundred ninety-seven".