74320543 has 4 divisors (see below), whose sum is σ = 81076968. Its totient is φ = 67564120.

The previous prime is 74320541. The next prime is 74320573. The reversal of 74320543 is 34502347.

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

It is a cyclic number.

It is not a de Polignac number, because 74320543 - 2¹ = 74320541 is a prime.

It is a super-2 number, since 2×74320543² = 11047086223629698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74320541) 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, 3378196 + ... + 3378217.

It is an arithmetic number, because the mean of its divisors is an integer number (20269242).

Almost surely, 2^74320543 is an apocalyptic number.

74320543 is a deficient number, since it is larger than the sum of its proper divisors (6756425).

74320543 is a wasteful number, since it uses less digits than its factorization.

74320543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756424.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 74320543 is about 8620.9363180573. The cubic root of 74320543 is about 420.4389647128.

The spelling of 74320543 in words is "seventy-four million, three hundred twenty thousand, five hundred forty-three".