75116945 has 4 divisors (see below), whose sum is σ = 90140340. Its totient is φ = 60093552.

The previous prime is 75116939. The next prime is 75116947. The reversal of 75116945 is 54961157.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54961157 = 239 ⋅229963.

It can be written as a sum of positive squares in 2 ways, for example, as 14167696 + 60949249 = 3764^2 + 7807^2 .

It is a cyclic number.

It is not a de Polignac number, because 75116945 - 2⁴ = 75116929 is a prime.

It is a super-2 number, since 2×75116945² = 11285110852266050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 75116899 and 75116908.

It is not an unprimeable number, because it can be changed into a prime (75116947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7511690 + ... + 7511699.

It is an arithmetic number, because the mean of its divisors is an integer number (22535085).

Almost surely, 2^75116945 is an apocalyptic number.

It is an amenable number.

75116945 is a deficient number, since it is larger than the sum of its proper divisors (15023395).

75116945 is a wasteful number, since it uses less digits than its factorization.

75116945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15023394.

The product of its digits is 37800, while the sum is 38.

The square root of 75116945 is about 8667.0032306444. The cubic root of 75116945 is about 421.9354082313.

The spelling of 75116945 in words is "seventy-five million, one hundred sixteen thousand, nine hundred forty-five".