71326139 has 2 divisors, whose sum is σ = 71326140. Its totient is φ = 71326138.

The previous prime is 71326081. The next prime is 71326147. The reversal of 71326139 is 93162317.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (93162317) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71326139 - 2⁸ = 71325883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71326159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35663069 + 35663070.

It is an arithmetic number, because the mean of its divisors is an integer number (35663070).

Almost surely, 2^71326139 is an apocalyptic number.

71326139 is a deficient number, since it is larger than the sum of its proper divisors (1).

71326139 is an equidigital number, since it uses as much as digits as its factorization.

71326139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 71326139 is about 8445.4803889418. The cubic root of 71326139 is about 414.7148357894.

The spelling of 71326139 in words is "seventy-one million, three hundred twenty-six thousand, one hundred thirty-nine".