75987491 has 2 divisors, whose sum is σ = 75987492. Its totient is φ = 75987490.

The previous prime is 75987463. The next prime is 75987523. The reversal of 75987491 is 19478957.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75987491 - 2¹⁴ = 75971107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (75981491) 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, 37993745 + 37993746.

It is an arithmetic number, because the mean of its divisors is an integer number (37993746).

Almost surely, 2^75987491 is an apocalyptic number.

75987491 is a deficient number, since it is larger than the sum of its proper divisors (1).

75987491 is an equidigital number, since it uses as much as digits as its factorization.

75987491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 75987491 is about 8717.0804172039. The cubic root of 75987491 is about 423.5591177130.

The spelling of 75987491 in words is "seventy-five million, nine hundred eighty-seven thousand, four hundred ninety-one".