76844421 has 6 divisors (see below), whose sum is σ = 110997510. Its totient is φ = 51229608.

The previous prime is 76844419. The next prime is 76844429. The reversal of 76844421 is 12444867.

It can be written as a sum of positive squares in only one way, i.e., 63776196 + 13068225 = 7986^2 + 3615^2 .

It is not a de Polignac number, because 76844421 - 2¹ = 76844419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76844429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4269126 + ... + 4269143.

It is an arithmetic number, because the mean of its divisors is an integer number (18499585).

Almost surely, 2^76844421 is an apocalyptic number.

It is an amenable number.

76844421 is a deficient number, since it is larger than the sum of its proper divisors (34153089).

76844421 is a wasteful number, since it uses less digits than its factorization.

76844421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8538275 (or 8538272 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 76844421 is about 8766.0949686847. The cubic root of 76844421 is about 425.1453638853.

The spelling of 76844421 in words is "seventy-six million, eight hundred forty-four thousand, four hundred twenty-one".