75138113 has 4 divisors (see below), whose sum is σ = 79558020. Its totient is φ = 70718208.

The previous prime is 75138109. The next prime is 75138121. The reversal of 75138113 is 31183157.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31183157 = 271 ⋅115067.

It can be written as a sum of positive squares in 2 ways, for example, as 40233649 + 34904464 = 6343^2 + 5908^2 .

It is a cyclic number.

It is not a de Polignac number, because 75138113 - 2² = 75138109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75135113) 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, 2209928 + ... + 2209961.

It is an arithmetic number, because the mean of its divisors is an integer number (19889505).

Almost surely, 2^75138113 is an apocalyptic number.

It is an amenable number.

75138113 is a deficient number, since it is larger than the sum of its proper divisors (4419907).

75138113 is a wasteful number, since it uses less digits than its factorization.

75138113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4419906.

The product of its digits is 2520, while the sum is 29.

The square root of 75138113 is about 8668.2243279694. The cubic root of 75138113 is about 421.9750383924.

The spelling of 75138113 in words is "seventy-five million, one hundred thirty-eight thousand, one hundred thirteen".