74397143 has 4 divisors (see below), whose sum is σ = 74461848. Its totient is φ = 74332440.

The previous prime is 74397101. The next prime is 74397149. The reversal of 74397143 is 34179347.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34179347 = 19 ⋅1798913.

It is a cyclic number.

It is not a de Polignac number, because 74397143 - 2⁶ = 74397079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74397097 and 74397106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74397149) by changing a digit.

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, 30596 + ... + 32937.

It is an arithmetic number, because the mean of its divisors is an integer number (18615462).

Almost surely, 2^74397143 is an apocalyptic number.

74397143 is a deficient number, since it is larger than the sum of its proper divisors (64705).

74397143 is a wasteful number, since it uses less digits than its factorization.

74397143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64704.

The product of its digits is 63504, while the sum is 38.

The square root of 74397143 is about 8625.3778467960. The cubic root of 74397143 is about 420.5833598121.

The spelling of 74397143 in words is "seventy-four million, three hundred ninety-seven thousand, one hundred forty-three".