71696657 has 2 divisors, whose sum is σ = 71696658. Its totient is φ = 71696656.

The previous prime is 71696641. The next prime is 71696683. The reversal of 71696657 is 75669617.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71503936 + 192721 = 8456^2 + 439^2 .

It is an emirp because it is prime and its reverse (75669617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71696657 - 2⁴ = 71696641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71696257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35848328 + 35848329.

It is an arithmetic number, because the mean of its divisors is an integer number (35848329).

Almost surely, 2^71696657 is an apocalyptic number.

It is an amenable number.

71696657 is a deficient number, since it is larger than the sum of its proper divisors (1).

71696657 is an equidigital number, since it uses as much as digits as its factorization.

71696657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 71696657 is about 8467.3878498626. The cubic root of 71696657 is about 415.4317025065.

The spelling of 71696657 in words is "seventy-one million, six hundred ninety-six thousand, six hundred fifty-seven".