74968821 has 20 divisors (see below), whose sum is σ = 112386252. Its totient is φ = 49802688.

The previous prime is 74968781. The next prime is 74968841. The reversal of 74968821 is 12886947.

It can be written as a sum of positive squares in 2 ways, for example, as 5062500 + 69906321 = 2250^2 + 8361^2 .

It is not a de Polignac number, because 74968821 - 2⁷ = 74968693 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74968841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23875 + ... + 26831.

Almost surely, 2^74968821 is an apocalyptic number.

It is an amenable number.

74968821 is a deficient number, since it is larger than the sum of its proper divisors (37417431).

74968821 is a wasteful number, since it uses less digits than its factorization.

74968821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3282 (or 3273 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 74968821 is about 8658.4537303147. The cubic root of 74968821 is about 421.6578859130.

The spelling of 74968821 in words is "seventy-four million, nine hundred sixty-eight thousand, eight hundred twenty-one".