71606693 has 2 divisors, whose sum is σ = 71606694. Its totient is φ = 71606692.

The previous prime is 71606671. The next prime is 71606699. The reversal of 71606693 is 39660617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67354849 + 4251844 = 8207^2 + 2062^2 .

It is an emirp because it is prime and its reverse (39660617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71606693 - 2¹⁶ = 71541157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71606699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35803346 + 35803347.

It is an arithmetic number, because the mean of its divisors is an integer number (35803347).

Almost surely, 2^71606693 is an apocalyptic number.

It is an amenable number.

71606693 is a deficient number, since it is larger than the sum of its proper divisors (1).

71606693 is an equidigital number, since it uses as much as digits as its factorization.

71606693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 71606693 is about 8462.0738001982. The cubic root of 71606693 is about 415.2578704096.

The spelling of 71606693 in words is "seventy-one million, six hundred six thousand, six hundred ninety-three".