76934821 has 4 divisors (see below), whose sum is σ = 76956192. Its totient is φ = 76913452.

The previous prime is 76934813. The next prime is 76934873. The reversal of 76934821 is 12843967.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 76934821 - 2³ = 76934813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76934801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3811 + ... + 12976.

It is an arithmetic number, because the mean of its divisors is an integer number (19239048).

Almost surely, 2^76934821 is an apocalyptic number.

It is an amenable number.

76934821 is a deficient number, since it is larger than the sum of its proper divisors (21371).

76934821 is a wasteful number, since it uses less digits than its factorization.

76934821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21370.

The product of its digits is 72576, while the sum is 40.

The square root of 76934821 is about 8771.2496829129. The cubic root of 76934821 is about 425.3120126339.

The spelling of 76934821 in words is "seventy-six million, nine hundred thirty-four thousand, eight hundred twenty-one".