75229979 has 4 divisors (see below), whose sum is σ = 82069080. Its totient is φ = 68390880.

The previous prime is 75229943. The next prime is 75230017. The reversal of 75229979 is 97992257.

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 75229979 - 2⁸ = 75229723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75229909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3419534 + ... + 3419555.

It is an arithmetic number, because the mean of its divisors is an integer number (20517270).

Almost surely, 2^75229979 is an apocalyptic number.

75229979 is a deficient number, since it is larger than the sum of its proper divisors (6839101).

75229979 is a wasteful number, since it uses less digits than its factorization.

75229979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6839100.

The product of its digits is 714420, while the sum is 50.

The square root of 75229979 is about 8673.5217184256. The cubic root of 75229979 is about 422.1469412594.

The spelling of 75229979 in words is "seventy-five million, two hundred twenty-nine thousand, nine hundred seventy-nine".