65490143 has 4 divisors (see below), whose sum is σ = 66091080. Its totient is φ = 64889208.

The previous prime is 65490127. The next prime is 65490157. The reversal of 65490143 is 34109456.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65490143 - 2⁴ = 65490127 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65490163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300305 + ... + 300522.

It is an arithmetic number, because the mean of its divisors is an integer number (16522770).

Almost surely, 2^65490143 is an apocalyptic number.

65490143 is a deficient number, since it is larger than the sum of its proper divisors (600937).

65490143 is a wasteful number, since it uses less digits than its factorization.

65490143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600936.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65490143 is about 8092.5980377132. The cubic root of 65490143 is about 403.0806772414.

Adding to 65490143 its reverse (34109456), we get a palindrome (99599599).

The spelling of 65490143 in words is "sixty-five million, four hundred ninety thousand, one hundred forty-three".