71139323 has 2 divisors, whose sum is σ = 71139324. Its totient is φ = 71139322.

The previous prime is 71139311. The next prime is 71139337. The reversal of 71139323 is 32393117.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71139323 is a prime.

It is not a weakly prime, because it can be changed into another prime (71139923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35569661 + 35569662.

It is an arithmetic number, because the mean of its divisors is an integer number (35569662).

Almost surely, 2^71139323 is an apocalyptic number.

71139323 is a deficient number, since it is larger than the sum of its proper divisors (1).

71139323 is an equidigital number, since it uses as much as digits as its factorization.

71139323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3402, while the sum is 29.

The square root of 71139323 is about 8434.4130204775. The cubic root of 71139323 is about 414.3524482781.

The spelling of 71139323 in words is "seventy-one million, one hundred thirty-nine thousand, three hundred twenty-three".