75643742 has 4 divisors (see below), whose sum is σ = 113465616. Its totient is φ = 37821870.

The previous prime is 75643741. The next prime is 75643747. The reversal of 75643742 is 24734657.

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

It is a junction number, because it is equal to n+sod(n) for n = 75643696 and 75643705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75643741) 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 as a sum of consecutive naturals, namely, 18910934 + ... + 18910937.

It is an arithmetic number, because the mean of its divisors is an integer number (28366404).

Almost surely, 2^75643742 is an apocalyptic number.

75643742 is a deficient number, since it is larger than the sum of its proper divisors (37821874).

75643742 is a wasteful number, since it uses less digits than its factorization.

75643742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37821873.

The product of its digits is 141120, while the sum is 38.

The square root of 75643742 is about 8697.3410879418. The cubic root of 75643742 is about 422.9194592432.

The spelling of 75643742 in words is "seventy-five million, six hundred forty-three thousand, seven hundred forty-two".