75638133 has 6 divisors (see below), whose sum is σ = 109255094. Its totient is φ = 50425416.

The previous prime is 75638113. The next prime is 75638137. The reversal of 75638133 is 33183657.

75638133 is a `hidden beast` number, since 7 + 5 + 638 + 13 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 75637809 + 324 = 8697^2 + 18^2 .

It is not a de Polignac number, because 75638133 - 2²¹ = 73540981 is a prime.

It is a super-2 number, since 2×75638133² = 11442254327451378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75638137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4202110 + ... + 4202127.

Almost surely, 2^75638133 is an apocalyptic number.

It is an amenable number.

75638133 is a deficient number, since it is larger than the sum of its proper divisors (33616961).

75638133 is a wasteful number, since it uses less digits than its factorization.

75638133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8404243 (or 8404240 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 75638133 is about 8697.0186270928. The cubic root of 75638133 is about 422.9090057947.

The spelling of 75638133 in words is "seventy-five million, six hundred thirty-eight thousand, one hundred thirty-three".