65504137 has 4 divisors (see below), whose sum is σ = 65527056. Its totient is φ = 65481220.

The previous prime is 65504119. The next prime is 65504143. The reversal of 65504137 is 73140556.

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-65504137 is a prime.

It is a super-2 number, since 2×65504137² = 8581583928229538, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65504099 and 65504108.

It is not an unprimeable number, because it can be changed into a prime (65564137) 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, 6439 + ... + 13132.

It is an arithmetic number, because the mean of its divisors is an integer number (16381764).

Almost surely, 2^65504137 is an apocalyptic number.

It is an amenable number.

65504137 is a deficient number, since it is larger than the sum of its proper divisors (22919).

65504137 is a wasteful number, since it uses less digits than its factorization.

65504137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22918.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 65504137 is about 8093.4626087973. The cubic root of 65504137 is about 403.1093854257.

The spelling of 65504137 in words is "sixty-five million, five hundred four thousand, one hundred thirty-seven".