74443139 has 2 divisors, whose sum is σ = 74443140. Its totient is φ = 74443138.

The previous prime is 74443133. The next prime is 74443141. The reversal of 74443139 is 93134447.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74443139 - 2⁴ = 74443123 is a prime.

It is a Sophie Germain prime.

Together with 74443141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74443099 and 74443108.

It is not a weakly prime, because it can be changed into another prime (74443133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37221569 + 37221570.

It is an arithmetic number, because the mean of its divisors is an integer number (37221570).

Almost surely, 2^74443139 is an apocalyptic number.

74443139 is a deficient number, since it is larger than the sum of its proper divisors (1).

74443139 is an equidigital number, since it uses as much as digits as its factorization.

74443139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 74443139 is about 8628.0437527866. The cubic root of 74443139 is about 420.6700171132.

The spelling of 74443139 in words is "seventy-four million, four hundred forty-three thousand, one hundred thirty-nine".