75112813 has 4 divisors (see below), whose sum is σ = 77702940. Its totient is φ = 72522688.

The previous prime is 75112727. The next prime is 75112847. The reversal of 75112813 is 31821157.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58936329 + 16176484 = 7677^2 + 4022^2 .

It is a cyclic number.

It is not a de Polignac number, because 75112813 - 2¹³ = 75104621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75112883) 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, 1295020 + ... + 1295077.

It is an arithmetic number, because the mean of its divisors is an integer number (19425735).

Almost surely, 2^75112813 is an apocalyptic number.

It is an amenable number.

75112813 is a deficient number, since it is larger than the sum of its proper divisors (2590127).

75112813 is a wasteful number, since it uses less digits than its factorization.

75112813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590126.

The product of its digits is 1680, while the sum is 28.

The square root of 75112813 is about 8666.7648520079. The cubic root of 75112813 is about 421.9276715434.

The spelling of 75112813 in words is "seventy-five million, one hundred twelve thousand, eight hundred thirteen".