75642727 has 4 divisors (see below), whose sum is σ = 75671640. Its totient is φ = 75613816.

The previous prime is 75642709. The next prime is 75642739. The reversal of 75642727 is 72724657.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75642727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75642727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75642767) 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, 10093 + ... + 15910.

It is an arithmetic number, because the mean of its divisors is an integer number (18917910).

Almost surely, 2^75642727 is an apocalyptic number.

75642727 is a deficient number, since it is larger than the sum of its proper divisors (28913).

75642727 is a wasteful number, since it uses less digits than its factorization.

75642727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28912.

The product of its digits is 164640, while the sum is 40.

The square root of 75642727 is about 8697.2827365793. The cubic root of 75642727 is about 422.9175676341.

The spelling of 75642727 in words is "seventy-five million, six hundred forty-two thousand, seven hundred twenty-seven".