65989143 has 12 divisors (see below), whose sum is σ = 103983048. Its totient is φ = 39993360.

The previous prime is 65989103. The next prime is 65989151. The reversal of 65989143 is 34198956.

It is a happy number.

It is not a de Polignac number, because 65989143 - 2¹² = 65985047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65989103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 333180 + ... + 333377.

It is an arithmetic number, because the mean of its divisors is an integer number (8665254).

Almost surely, 2^65989143 is an apocalyptic number.

65989143 is a deficient number, since it is larger than the sum of its proper divisors (37993905).

65989143 is a wasteful number, since it uses less digits than its factorization.

65989143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666574 (or 666571 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 65989143 is about 8123.3701749951. The cubic root of 65989143 is about 404.1018413809.

The spelling of 65989143 in words is "sixty-five million, nine hundred eighty-nine thousand, one hundred forty-three".