74674821 has 8 divisors (see below), whose sum is σ = 107225440. Its totient is φ = 45953712.

The previous prime is 74674793. The next prime is 74674837. The reversal of 74674821 is 12847647.

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

It is not a de Polignac number, because 74674821 - 2⁶ = 74674757 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1914739 = 74674821 / (7 + 4 + 6 + 7 + 4 + 8 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74674821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74674841) 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 7 ways as a sum of consecutive naturals, for example, 957331 + ... + 957408.

It is an arithmetic number, because the mean of its divisors is an integer number (13403180).

Almost surely, 2^74674821 is an apocalyptic number.

It is an amenable number.

74674821 is a deficient number, since it is larger than the sum of its proper divisors (32550619).

74674821 is a wasteful number, since it uses less digits than its factorization.

74674821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1914755.

The product of its digits is 75264, while the sum is 39.

The square root of 74674821 is about 8641.4594253517. The cubic root of 74674821 is about 421.1059683636.

The spelling of 74674821 in words is "seventy-four million, six hundred seventy-four thousand, eight hundred twenty-one".