71600657 has 2 divisors, whose sum is σ = 71600658. Its totient is φ = 71600656.

The previous prime is 71600653. The next prime is 71600687. The reversal of 71600657 is 75600617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71503936 + 96721 = 8456^2 + 311^2 .

It is an emirp because it is prime and its reverse (75600617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71600657 - 2² = 71600653 is a prime.

It is not a weakly prime, because it can be changed into another prime (71600653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35800328 + 35800329.

It is an arithmetic number, because the mean of its divisors is an integer number (35800329).

Almost surely, 2^71600657 is an apocalyptic number.

It is an amenable number.

71600657 is a deficient number, since it is larger than the sum of its proper divisors (1).

71600657 is an equidigital number, since it uses as much as digits as its factorization.

71600657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 71600657 is about 8461.7171425190. The cubic root of 71600657 is about 415.2462021943.

The spelling of 71600657 in words is "seventy-one million, six hundred thousand, six hundred fifty-seven".