65140237 has 4 divisors (see below), whose sum is σ = 65156476. Its totient is φ = 65124000.

The previous prime is 65140223. The next prime is 65140241. The reversal of 65140237 is 73204156.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 26563716 + 38576521 = 5154^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 65140237 - 2¹¹ = 65138189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65140247) 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, 2737 + ... + 11737.

It is an arithmetic number, because the mean of its divisors is an integer number (16289119).

Almost surely, 2^65140237 is an apocalyptic number.

It is an amenable number.

65140237 is a deficient number, since it is larger than the sum of its proper divisors (16239).

65140237 is an equidigital number, since it uses as much as digits as its factorization.

65140237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16238.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 65140237 is about 8070.9501918919. The cubic root of 65140237 is about 402.3615243202.

The spelling of 65140237 in words is "sixty-five million, one hundred forty thousand, two hundred thirty-seven".