75997949 has 2 divisors, whose sum is σ = 75997950. Its totient is φ = 75997948.

The previous prime is 75997913. The next prime is 75997981. The reversal of 75997949 is 94979957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43428100 + 32569849 = 6590^2 + 5707^2 .

It is an emirp because it is prime and its reverse (94979957) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75997949 - 2⁸ = 75997693 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 (75997049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37998974 + 37998975.

It is an arithmetic number, because the mean of its divisors is an integer number (37998975).

Almost surely, 2^75997949 is an apocalyptic number.

It is an amenable number.

75997949 is a deficient number, since it is larger than the sum of its proper divisors (1).

75997949 is an equidigital number, since it uses as much as digits as its factorization.

75997949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 59.

The square root of 75997949 is about 8717.6802533702. The cubic root of 75997949 is about 423.5785480078.

The spelling of 75997949 in words is "seventy-five million, nine hundred ninety-seven thousand, nine hundred forty-nine".