75798991 has 2 divisors, whose sum is σ = 75798992. Its totient is φ = 75798990.

The previous prime is 75798959. The next prime is 75799049. The reversal of 75798991 is 19989757.

It is a weak prime.

It is an emirp because it is prime and its reverse (19989757) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75798991 - 2⁵ = 75798959 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 (75798911) 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, 37899495 + 37899496.

It is an arithmetic number, because the mean of its divisors is an integer number (37899496).

Almost surely, 2^75798991 is an apocalyptic number.

75798991 is a deficient number, since it is larger than the sum of its proper divisors (1).

75798991 is an equidigital number, since it uses as much as digits as its factorization.

75798991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 55.

The square root of 75798991 is about 8706.2615972644. The cubic root of 75798991 is about 423.2085907010.

The spelling of 75798991 in words is "seventy-five million, seven hundred ninety-eight thousand, nine hundred ninety-one".