71650897 has 2 divisors, whose sum is σ = 71650898. Its totient is φ = 71650896.

The previous prime is 71650883. The next prime is 71650913. The reversal of 71650897 is 79805617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56565441 + 15085456 = 7521^2 + 3884^2 .

It is a cyclic number.

It is not a de Polignac number, because 71650897 - 2¹⁹ = 71126609 is a prime.

It is not a weakly prime, because it can be changed into another prime (71650847) 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, 35825448 + 35825449.

It is an arithmetic number, because the mean of its divisors is an integer number (35825449).

Almost surely, 2^71650897 is an apocalyptic number.

It is an amenable number.

71650897 is a deficient number, since it is larger than the sum of its proper divisors (1).

71650897 is an equidigital number, since it uses as much as digits as its factorization.

71650897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 71650897 is about 8464.6852865301. The cubic root of 71650897 is about 415.3433013578.

The spelling of 71650897 in words is "seventy-one million, six hundred fifty thousand, eight hundred ninety-seven".