75117131 has 2 divisors, whose sum is σ = 75117132. Its totient is φ = 75117130.

The previous prime is 75117113. The next prime is 75117143. The reversal of 75117131 is 13171157.

Together with previous prime (75117113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 75117131 - 2²⁶ = 8008267 is a prime.

It is a super-2 number, since 2×75117131² = 11285166739342322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75117131.

It is not a weakly prime, because it can be changed into another prime (75117151) 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, 37558565 + 37558566.

It is an arithmetic number, because the mean of its divisors is an integer number (37558566).

Almost surely, 2^75117131 is an apocalyptic number.

75117131 is a deficient number, since it is larger than the sum of its proper divisors (1).

75117131 is an equidigital number, since it uses as much as digits as its factorization.

75117131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 735, while the sum is 26.

The square root of 75117131 is about 8667.0139609903. The cubic root of 75117131 is about 421.9357564879.

Adding to 75117131 its reverse (13171157), we get a palindrome (88288288).

The spelling of 75117131 in words is "seventy-five million, one hundred seventeen thousand, one hundred thirty-one".