71898737 has 2 divisors, whose sum is σ = 71898738. Its totient is φ = 71898736.

The previous prime is 71898731. The next prime is 71898779. The reversal of 71898737 is 73789817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48385936 + 23512801 = 6956^2 + 4849^2 .

It is a cyclic number.

It is not a de Polignac number, because 71898737 - 2¹⁴ = 71882353 is a prime.

It is not a weakly prime, because it can be changed into another prime (71898731) 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, 35949368 + 35949369.

It is an arithmetic number, because the mean of its divisors is an integer number (35949369).

Almost surely, 2^71898737 is an apocalyptic number.

It is an amenable number.

71898737 is a deficient number, since it is larger than the sum of its proper divisors (1).

71898737 is an equidigital number, since it uses as much as digits as its factorization.

71898737 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 50.

The square root of 71898737 is about 8479.3122952277. The cubic root of 71898737 is about 415.8216402090.

The spelling of 71898737 in words is "seventy-one million, eight hundred ninety-eight thousand, seven hundred thirty-seven".