65144873 has 4 divisors (see below), whose sum is σ = 65576448. Its totient is φ = 64713300.

The previous prime is 65144861. The next prime is 65144879. The reversal of 65144873 is 37844156.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65144873 is a prime.

It is a super-2 number, since 2×65144873² = 8487708956372258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65144879) 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, 215561 + ... + 215862.

It is an arithmetic number, because the mean of its divisors is an integer number (16394112).

Almost surely, 2^65144873 is an apocalyptic number.

It is an amenable number.

65144873 is a deficient number, since it is larger than the sum of its proper divisors (431575).

65144873 is a wasteful number, since it uses less digits than its factorization.

65144873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431574.

The product of its digits is 80640, while the sum is 38.

The square root of 65144873 is about 8071.2373896448. The cubic root of 65144873 is about 402.3710693872.

The spelling of 65144873 in words is "sixty-five million, one hundred forty-four thousand, eight hundred seventy-three".