65397239 has 4 divisors (see below), whose sum is σ = 65413656. Its totient is φ = 65380824.

The previous prime is 65397217. The next prime is 65397263. The reversal of 65397239 is 93279356.

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 is a cyclic number.

It is not a de Polignac number, because 65397239 - 2⁸ = 65396983 is a prime.

It is a super-3 number, since 3×65397239³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65397239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65397139) 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, 1997 + ... + 11609.

It is an arithmetic number, because the mean of its divisors is an integer number (16353414).

Almost surely, 2^65397239 is an apocalyptic number.

65397239 is a deficient number, since it is larger than the sum of its proper divisors (16417).

65397239 is an equidigital number, since it uses as much as digits as its factorization.

65397239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16416.

The product of its digits is 306180, while the sum is 44.

The square root of 65397239 is about 8086.8559403516. The cubic root of 65397239 is about 402.8899842748.

The spelling of 65397239 in words is "sixty-five million, three hundred ninety-seven thousand, two hundred thirty-nine".