65397517 has 4 divisors (see below), whose sum is σ = 65514240. Its totient is φ = 65280796.

The previous prime is 65397509. The next prime is 65397559. The reversal of 65397517 is 71579356.

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 65397517 - 2³ = 65397509 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 (65397217) 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, 57517 + ... + 58642.

It is an arithmetic number, because the mean of its divisors is an integer number (16378560).

Almost surely, 2^65397517 is an apocalyptic number.

It is an amenable number.

65397517 is a deficient number, since it is larger than the sum of its proper divisors (116723).

65397517 is a wasteful number, since it uses less digits than its factorization.

65397517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116722.

The product of its digits is 198450, while the sum is 43.

The square root of 65397517 is about 8086.8731287192. The cubic root of 65397517 is about 402.8905551616.

The spelling of 65397517 in words is "sixty-five million, three hundred ninety-seven thousand, five hundred seventeen".