71995387 has 2 divisors, whose sum is σ = 71995388. Its totient is φ = 71995386.

The previous prime is 71995381. The next prime is 71995397. The reversal of 71995387 is 78359917.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71995387 - 2¹⁵ = 71962619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71995387.

It is not a weakly prime, because it can be changed into another prime (71995381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35997693 + 35997694.

It is an arithmetic number, because the mean of its divisors is an integer number (35997694).

Almost surely, 2^71995387 is an apocalyptic number.

71995387 is a deficient number, since it is larger than the sum of its proper divisors (1).

71995387 is an equidigital number, since it uses as much as digits as its factorization.

71995387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 476280, while the sum is 49.

The square root of 71995387 is about 8485.0095462527. The cubic root of 71995387 is about 416.0078797663.

The spelling of 71995387 in words is "seventy-one million, nine hundred ninety-five thousand, three hundred eighty-seven".