75617131 has 4 divisors (see below), whose sum is σ = 79597000. Its totient is φ = 71637264.

The previous prime is 75617117. The next prime is 75617149. The reversal of 75617131 is 13171657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13171657 = 131 ⋅100547.

It is a cyclic number.

It is not a de Polignac number, because 75617131 - 2¹¹ = 75615083 is a prime.

It is a super-2 number, since 2×75617131² = 11435901001342322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75617093 and 75617102.

It is not an unprimeable number, because it can be changed into a prime (75617831) 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 in 3 ways as a sum of consecutive naturals, for example, 1989906 + ... + 1989943.

It is an arithmetic number, because the mean of its divisors is an integer number (19899250).

Almost surely, 2^75617131 is an apocalyptic number.

75617131 is a deficient number, since it is larger than the sum of its proper divisors (3979869).

75617131 is a wasteful number, since it uses less digits than its factorization.

75617131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3979868.

The product of its digits is 4410, while the sum is 31.

The square root of 75617131 is about 8695.8111180039. The cubic root of 75617131 is about 422.8698599442.

Adding to 75617131 its reverse (13171657), we get a palindrome (88788788).

The spelling of 75617131 in words is "seventy-five million, six hundred seventeen thousand, one hundred thirty-one".