75691591 has 2 divisors, whose sum is σ = 75691592. Its totient is φ = 75691590.

The previous prime is 75691549. The next prime is 75691613. The reversal of 75691591 is 19519657.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75691591 - 2²⁵ = 42137159 is a prime.

It is a super-2 number, since 2×75691591² = 11458433896222562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75691501) 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, 37845795 + 37845796.

It is an arithmetic number, because the mean of its divisors is an integer number (37845796).

Almost surely, 2^75691591 is an apocalyptic number.

75691591 is a deficient number, since it is larger than the sum of its proper divisors (1).

75691591 is an equidigital number, since it uses as much as digits as its factorization.

75691591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 43.

The square root of 75691591 is about 8700.0914363011. The cubic root of 75691591 is about 423.0086140421.

The spelling of 75691591 in words is "seventy-five million, six hundred ninety-one thousand, five hundred ninety-one".