65149873 has 4 divisors (see below), whose sum is σ = 65540160. Its totient is φ = 64759588.

The previous prime is 65149871. The next prime is 65149883. The reversal of 65149873 is 37894156.

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 not a de Polignac number, because 65149873 - 2¹ = 65149871 is a prime.

It is a super-2 number, since 2×65149873² = 8489011903832258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65149871) 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, 194893 + ... + 195226.

It is an arithmetic number, because the mean of its divisors is an integer number (16385040).

Almost surely, 2^65149873 is an apocalyptic number.

It is an amenable number.

65149873 is a deficient number, since it is larger than the sum of its proper divisors (390287).

65149873 is a wasteful number, since it uses less digits than its factorization.

65149873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390286.

The product of its digits is 181440, while the sum is 43.

The square root of 65149873 is about 8071.5471255516. The cubic root of 65149873 is about 402.3813633868.

The spelling of 65149873 in words is "sixty-five million, one hundred forty-nine thousand, eight hundred seventy-three".