75727631 has 4 divisors (see below), whose sum is σ = 86545872. Its totient is φ = 64909392.

The previous prime is 75727549. The next prime is 75727633. The reversal of 75727631 is 13672757.

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

It is a cyclic number.

It is not a de Polignac number, because 75727631 - 2¹⁴ = 75711247 is a prime.

It is a super-2 number, since 2×75727631² = 11469348193744322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75727633) 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 3 ways as a sum of consecutive naturals, for example, 5409110 + ... + 5409123.

It is an arithmetic number, because the mean of its divisors is an integer number (21636468).

Almost surely, 2^75727631 is an apocalyptic number.

75727631 is a deficient number, since it is larger than the sum of its proper divisors (10818241).

75727631 is a wasteful number, since it uses less digits than its factorization.

75727631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10818240.

The product of its digits is 61740, while the sum is 38.

The square root of 75727631 is about 8702.1624324072. The cubic root of 75727631 is about 423.0757408799.

The spelling of 75727631 in words is "seventy-five million, seven hundred twenty-seven thousand, six hundred thirty-one".