75972287 has 2 divisors, whose sum is σ = 75972288. Its totient is φ = 75972286.

The previous prime is 75972233. The next prime is 75972293. The reversal of 75972287 is 78227957.

It is a strong prime.

It is an emirp because it is prime and its reverse (78227957) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75972287 - 2¹⁰ = 75971263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75972217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37986143 + 37986144.

It is an arithmetic number, because the mean of its divisors is an integer number (37986144).

Almost surely, 2^75972287 is an apocalyptic number.

75972287 is a deficient number, since it is larger than the sum of its proper divisors (1).

75972287 is an equidigital number, since it uses as much as digits as its factorization.

75972287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 493920, while the sum is 47.

The square root of 75972287 is about 8716.2082926006. The cubic root of 75972287 is about 423.5308664737.

The spelling of 75972287 in words is "seventy-five million, nine hundred seventy-two thousand, two hundred eighty-seven".