65623717 has 2 divisors, whose sum is σ = 65623718. Its totient is φ = 65623716.

The previous prime is 65623711. The next prime is 65623721. The reversal of 65623717 is 71732656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49575681 + 16048036 = 7041^2 + 4006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65623717 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65623711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32811858 + 32811859.

It is an arithmetic number, because the mean of its divisors is an integer number (32811859).

Almost surely, 2^65623717 is an apocalyptic number.

It is an amenable number.

65623717 is a deficient number, since it is larger than the sum of its proper divisors (1).

65623717 is an equidigital number, since it uses as much as digits as its factorization.

65623717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 65623717 is about 8100.8466841436. The cubic root of 65623717 is about 403.3545328808.

The spelling of 65623717 in words is "sixty-five million, six hundred twenty-three thousand, seven hundred seventeen".