74360921 has 4 divisors (see below), whose sum is σ = 76174644. Its totient is φ = 72547200.

The previous prime is 74360917. The next prime is 74360933. The reversal of 74360921 is 12906347.

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 5470921 + 68890000 = 2339^2 + 8300^2 .

It is a cyclic number.

It is not a de Polignac number, because 74360921 - 2² = 74360917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74360021) 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 3 ways as a sum of consecutive naturals, for example, 906800 + ... + 906881.

It is an arithmetic number, because the mean of its divisors is an integer number (19043661).

Almost surely, 2^74360921 is an apocalyptic number.

It is an amenable number.

74360921 is a deficient number, since it is larger than the sum of its proper divisors (1813723).

74360921 is a wasteful number, since it uses less digits than its factorization.

74360921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813722.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 74360921 is about 8623.2778570564. The cubic root of 74360921 is about 420.5150917625.

The spelling of 74360921 in words is "seventy-four million, three hundred sixty thousand, nine hundred twenty-one".