71878297 has 2 divisors, whose sum is σ = 71878298. Its totient is φ = 71878296.

The previous prime is 71878277. The next prime is 71878307. The reversal of 71878297 is 79287817.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71842576 + 35721 = 8476^2 + 189^2 .

It is a cyclic number.

It is not a de Polignac number, because 71878297 - 2¹⁹ = 71354009 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71878297.

It is not a weakly prime, because it can be changed into another prime (71878277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35939148 + 35939149.

It is an arithmetic number, because the mean of its divisors is an integer number (35939149).

Almost surely, 2^71878297 is an apocalyptic number.

It is an amenable number.

71878297 is a deficient number, since it is larger than the sum of its proper divisors (1).

71878297 is an equidigital number, since it uses as much as digits as its factorization.

71878297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 49.

The square root of 71878297 is about 8478.1069231285. The cubic root of 71878297 is about 415.7822320069.

The spelling of 71878297 in words is "seventy-one million, eight hundred seventy-eight thousand, two hundred ninety-seven".