71640323 has 2 divisors, whose sum is σ = 71640324. Its totient is φ = 71640322.

The previous prime is 71640313. The next prime is 71640341. The reversal of 71640323 is 32304617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71640323 - 2¹⁰ = 71639299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71640292 and 71640301.

It is not a weakly prime, because it can be changed into another prime (71640313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35820161 + 35820162.

It is an arithmetic number, because the mean of its divisors is an integer number (35820162).

Almost surely, 2^71640323 is an apocalyptic number.

71640323 is a deficient number, since it is larger than the sum of its proper divisors (1).

71640323 is an equidigital number, since it uses as much as digits as its factorization.

71640323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 71640323 is about 8464.0606684971. The cubic root of 71640323 is about 415.3228686937.

The spelling of 71640323 in words is "seventy-one million, six hundred forty thousand, three hundred twenty-three".