74348921 has 4 divisors (see below), whose sum is σ = 74393844. Its totient is φ = 74304000.

The previous prime is 74348893. The next prime is 74348929. The reversal of 74348921 is 12984347.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 53290000 + 21058921 = 7300^2 + 4589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74348921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74348929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19880 + ... + 23321.

It is an arithmetic number, because the mean of its divisors is an integer number (18598461).

Almost surely, 2^74348921 is an apocalyptic number.

It is an amenable number.

74348921 is a deficient number, since it is larger than the sum of its proper divisors (44923).

74348921 is a wasteful number, since it uses less digits than its factorization.

74348921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44922.

The product of its digits is 48384, while the sum is 38.

The square root of 74348921 is about 8622.5820378817. The cubic root of 74348921 is about 420.4924703260.

The spelling of 74348921 in words is "seventy-four million, three hundred forty-eight thousand, nine hundred twenty-one".