76721833 has 8 divisors (see below), whose sum is σ = 81436320. Its totient is φ = 72029760.

The previous prime is 76721809. The next prime is 76721837. The reversal of 76721833 is 33812767.

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 76721833 - 2²¹ = 74624681 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76721792 and 76721801.

It is not an unprimeable number, because it can be changed into a prime (76721837) 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, 1738 + ... + 12508.

It is an arithmetic number, because the mean of its divisors is an integer number (10179540).

Almost surely, 2^76721833 is an apocalyptic number.

It is an amenable number.

76721833 is a deficient number, since it is larger than the sum of its proper divisors (4714487).

76721833 is a wasteful number, since it uses less digits than its factorization.

76721833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11207.

The product of its digits is 42336, while the sum is 37.

The square root of 76721833 is about 8759.1000108459. The cubic root of 76721833 is about 424.9191689414.

The spelling of 76721833 in words is "seventy-six million, seven hundred twenty-one thousand, eight hundred thirty-three".