75797947 has 4 divisors (see below), whose sum is σ = 75816720. Its totient is φ = 75779176.

The previous prime is 75797921. The next prime is 75797963. The reversal of 75797947 is 74979757.

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 75797947 - 2⁷ = 75797819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75797147) 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, 568 + ... + 12325.

It is an arithmetic number, because the mean of its divisors is an integer number (18954180).

Almost surely, 2^75797947 is an apocalyptic number.

75797947 is a deficient number, since it is larger than the sum of its proper divisors (18773).

75797947 is a wasteful number, since it uses less digits than its factorization.

75797947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18772.

The product of its digits is 3889620, while the sum is 55.

The square root of 75797947 is about 8706.2016402103. The cubic root of 75797947 is about 423.2066477033.

The spelling of 75797947 in words is "seventy-five million, seven hundred ninety-seven thousand, nine hundred forty-seven".