7975399 has 2 divisors, whose sum is σ = 7975400. Its totient is φ = 7975398.

The previous prime is 7975369. The next prime is 7975417. The reversal of 7975399 is 9935797.

It is a strong prime.

It is an emirp because it is prime and its reverse (9935797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7975399 - 2⁷ = 7975271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7975309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3987699 + 3987700.

It is an arithmetic number, because the mean of its divisors is an integer number (3987700).

Almost surely, 2^7975399 is an apocalyptic number.

7975399 is a deficient number, since it is larger than the sum of its proper divisors (1).

7975399 is an equidigital number, since it uses as much as digits as its factorization.

7975399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 535815, while the sum is 49.

The square root of 7975399 is about 2824.0748927746. The cubic root of 7975399 is about 199.7947811648.

The spelling of 7975399 in words is "seven million, nine hundred seventy-five thousand, three hundred ninety-nine".