76530821 has 8 divisors (see below), whose sum is σ = 84556224. Its totient is φ = 68896960.

The previous prime is 76530799. The next prime is 76530827. The reversal of 76530821 is 12803567.

It is a happy number.

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

It is not a de Polignac number, because 76530821 - 2¹⁴ = 76514437 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 (76530827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97475 + ... + 98256.

It is an arithmetic number, because the mean of its divisors is an integer number (10569528).

Almost surely, 2^76530821 is an apocalyptic number.

It is an amenable number.

76530821 is a deficient number, since it is larger than the sum of its proper divisors (8025403).

76530821 is a wasteful number, since it uses less digits than its factorization.

76530821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195771.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 76530821 is about 8748.1895841368. The cubic root of 76530821 is about 424.5662398026.

The spelling of 76530821 in words is "seventy-six million, five hundred thirty thousand, eight hundred twenty-one".