74313021 has 4 divisors (see below), whose sum is σ = 99084032. Its totient is φ = 49542012.

The previous prime is 74313011. The next prime is 74313059. The reversal of 74313021 is 12031347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 74313021 - 2⁶ = 74312957 is a prime.

It is the 8621-st Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74313011) by changing a digit.

It is a nontrivial repunit in base 8620.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12385501 + ... + 12385506.

It is an arithmetic number, because the mean of its divisors is an integer number (24771008).

Almost surely, 2^74313021 is an apocalyptic number.

It is an amenable number.

74313021 is a deficient number, since it is larger than the sum of its proper divisors (24771011).

74313021 is a wasteful number, since it uses less digits than its factorization.

74313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24771010.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 74313021 is about 8620.5000435010. The cubic root of 74313021 is about 420.4247799913.

Adding to 74313021 its reverse (12031347), we get a palindrome (86344368).

The spelling of 74313021 in words is "seventy-four million, three hundred thirteen thousand, twenty-one".