76487221 has 4 divisors (see below), whose sum is σ = 76546444. Its totient is φ = 76428000.

The previous prime is 76487209. The next prime is 76487227. The reversal of 76487221 is 12278467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45562500 + 30924721 = 6750^2 + 5561^2 .

It is a cyclic number.

It is not a de Polignac number, because 76487221 - 2¹¹ = 76485173 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 (76487227) 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, 27630 + ... + 30271.

It is an arithmetic number, because the mean of its divisors is an integer number (19136611).

Almost surely, 2^76487221 is an apocalyptic number.

It is an amenable number.

76487221 is a deficient number, since it is larger than the sum of its proper divisors (59223).

76487221 is a wasteful number, since it uses less digits than its factorization.

76487221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59222.

The product of its digits is 37632, while the sum is 37.

The square root of 76487221 is about 8745.6972849510. The cubic root of 76487221 is about 424.4855986343.

The spelling of 76487221 in words is "seventy-six million, four hundred eighty-seven thousand, two hundred twenty-one".