74193421 has 4 divisors (see below), whose sum is σ = 74378844. Its totient is φ = 74008000.

The previous prime is 74193409. The next prime is 74193467. The reversal of 74193421 is 12439147.

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 73770921 + 422500 = 8589^2 + 650^2 .

It is a cyclic number.

It is not a de Polignac number, because 74193421 - 2⁷ = 74193293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74193121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92110 + ... + 92911.

It is an arithmetic number, because the mean of its divisors is an integer number (18594711).

Almost surely, 2^74193421 is an apocalyptic number.

It is an amenable number.

74193421 is a deficient number, since it is larger than the sum of its proper divisors (185423).

74193421 is a wasteful number, since it uses less digits than its factorization.

74193421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185422.

The product of its digits is 6048, while the sum is 31.

The square root of 74193421 is about 8613.5602975773. The cubic root of 74193421 is about 420.1991138279.

The spelling of 74193421 in words is "seventy-four million, one hundred ninety-three thousand, four hundred twenty-one".