65627909 has 2 divisors, whose sum is σ = 65627910. Its totient is φ = 65627908.

The previous prime is 65627897. The next prime is 65627911. The reversal of 65627909 is 90972656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 1387684 = 8015^2 + 1178^2 .

It is a cyclic number.

It is not a de Polignac number, because 65627909 - 2¹² = 65623813 is a prime.

Together with 65627911, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65627909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65627999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32813954 + 32813955.

It is an arithmetic number, because the mean of its divisors is an integer number (32813955).

Almost surely, 2^65627909 is an apocalyptic number.

It is an amenable number.

65627909 is a deficient number, since it is larger than the sum of its proper divisors (1).

65627909 is an equidigital number, since it uses as much as digits as its factorization.

65627909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 65627909 is about 8101.1054183982. The cubic root of 65627909 is about 403.3631213723.

The spelling of 65627909 in words is "sixty-five million, six hundred twenty-seven thousand, nine hundred nine".