75772921 has 8 divisors (see below), whose sum is σ = 86823360. Its totient is φ = 64778928.

The previous prime is 75772903. The next prime is 75772937. The reversal of 75772921 is 12927757.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 75772921 - 2⁷ = 75772793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75772981) 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 7 ways as a sum of consecutive naturals, for example, 11191 + ... + 16636.

It is an arithmetic number, because the mean of its divisors is an integer number (10852920).

Almost surely, 2^75772921 is an apocalyptic number.

It is an amenable number.

75772921 is a deficient number, since it is larger than the sum of its proper divisors (11050439).

75772921 is a wasteful number, since it uses less digits than its factorization.

75772921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28223.

The product of its digits is 61740, while the sum is 40.

The square root of 75772921 is about 8704.7642702143. The cubic root of 75772921 is about 423.1600662508.

The spelling of 75772921 in words is "seventy-five million, seven hundred seventy-two thousand, nine hundred twenty-one".