71092391 has 2 divisors, whose sum is σ = 71092392. Its totient is φ = 71092390.

The previous prime is 71092321. The next prime is 71092397. The reversal of 71092391 is 19329017.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71092391 - 2¹⁴ = 71076007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71092397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35546195 + 35546196.

It is an arithmetic number, because the mean of its divisors is an integer number (35546196).

Almost surely, 2^71092391 is an apocalyptic number.

71092391 is a deficient number, since it is larger than the sum of its proper divisors (1).

71092391 is an equidigital number, since it uses as much as digits as its factorization.

71092391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 71092391 is about 8431.6303880092. The cubic root of 71092391 is about 414.2613094338.

The spelling of 71092391 in words is "seventy-one million, ninety-two thousand, three hundred ninety-one".