65143997 has 2 divisors, whose sum is σ = 65143998. Its totient is φ = 65143996.

The previous prime is 65143973. The next prime is 65144003. The reversal of 65143997 is 79934156.

65143997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57365476 + 7778521 = 7574^2 + 2789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65143997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65143907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32571998 + 32571999.

It is an arithmetic number, because the mean of its divisors is an integer number (32571999).

Almost surely, 2^65143997 is an apocalyptic number.

It is an amenable number.

65143997 is a deficient number, since it is larger than the sum of its proper divisors (1).

65143997 is an equidigital number, since it uses as much as digits as its factorization.

65143997 is an odious number, because the sum of its binary digits is odd.

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

The square root of 65143997 is about 8071.1831226903. The cubic root of 65143997 is about 402.3692658243.

The spelling of 65143997 in words is "sixty-five million, one hundred forty-three thousand, nine hundred ninety-seven".