71740393 has 4 divisors (see below), whose sum is σ = 71815248. Its totient is φ = 71665540.

The previous prime is 71740379. The next prime is 71740439. The reversal of 71740393 is 39304717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71740393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71740343) 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, 35971 + ... + 37912.

It is an arithmetic number, because the mean of its divisors is an integer number (17953812).

Almost surely, 2^71740393 is an apocalyptic number.

It is an amenable number.

71740393 is a deficient number, since it is larger than the sum of its proper divisors (74855).

71740393 is an equidigital number, since it uses as much as digits as its factorization.

71740393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74854.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 71740393 is about 8469.9700707854. The cubic root of 71740393 is about 415.5161584558.

The spelling of 71740393 in words is "seventy-one million, seven hundred forty thousand, three hundred ninety-three".