65985893 has 2 divisors, whose sum is σ = 65985894. Its totient is φ = 65985892.

The previous prime is 65985889. The next prime is 65985929. The reversal of 65985893 is 39858956.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57123364 + 8862529 = 7558^2 + 2977^2 .

It is a cyclic number.

It is not a de Polignac number, because 65985893 - 2² = 65985889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65985863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32992946 + 32992947.

It is an arithmetic number, because the mean of its divisors is an integer number (32992947).

Almost surely, 2^65985893 is an apocalyptic number.

It is an amenable number.

65985893 is a deficient number, since it is larger than the sum of its proper divisors (1).

65985893 is an equidigital number, since it uses as much as digits as its factorization.

65985893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 53.

The square root of 65985893 is about 8123.1701324052. The cubic root of 65985893 is about 404.0952071959.

The spelling of 65985893 in words is "sixty-five million, nine hundred eighty-five thousand, eight hundred ninety-three".