74377821 has 8 divisors (see below), whose sum is σ = 113337664. Its totient is φ = 42501600.

The previous prime is 74377783. The next prime is 74377841. The reversal of 74377821 is 12877347.

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

It is not a de Polignac number, because 74377821 - 2¹¹ = 74375773 is a prime.

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 74377821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74377841) 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, 1770880 + ... + 1770921.

It is an arithmetic number, because the mean of its divisors is an integer number (14167208).

Almost surely, 2^74377821 is an apocalyptic number.

It is an amenable number.

74377821 is a deficient number, since it is larger than the sum of its proper divisors (38959843).

74377821 is a wasteful number, since it uses less digits than its factorization.

74377821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541811.

The product of its digits is 65856, while the sum is 39.

The square root of 74377821 is about 8624.2577071885. The cubic root of 74377821 is about 420.5469461588.

The spelling of 74377821 in words is "seventy-four million, three hundred seventy-seven thousand, eight hundred twenty-one".