74139347 has 2 divisors, whose sum is σ = 74139348. Its totient is φ = 74139346.

The previous prime is 74139301. The next prime is 74139361. The reversal of 74139347 is 74393147.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74139347 - 2¹² = 74135251 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74139347.

It is not a weakly prime, because it can be changed into another prime (74139547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37069673 + 37069674.

It is an arithmetic number, because the mean of its divisors is an integer number (37069674).

Almost surely, 2^74139347 is an apocalyptic number.

74139347 is a deficient number, since it is larger than the sum of its proper divisors (1).

74139347 is an equidigital number, since it uses as much as digits as its factorization.

74139347 is an evil number, because the sum of its binary digits is even.

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

The square root of 74139347 is about 8610.4208375665. The cubic root of 74139347 is about 420.0970051823.

The spelling of 74139347 in words is "seventy-four million, one hundred thirty-nine thousand, three hundred forty-seven".