65139485 has 4 divisors (see below), whose sum is σ = 78167388. Its totient is φ = 52111584.

The previous prime is 65139449. The next prime is 65139493. The reversal of 65139485 is 58493156.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20557156 + 44582329 = 4534^2 + 6677^2 .

It is a cyclic number.

It is not a de Polignac number, because 65139485 - 2⁸ = 65139229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6513944 + ... + 6513953.

It is an arithmetic number, because the mean of its divisors is an integer number (19541847).

Almost surely, 2^65139485 is an apocalyptic number.

It is an amenable number.

65139485 is a deficient number, since it is larger than the sum of its proper divisors (13027903).

65139485 is a wasteful number, since it uses less digits than its factorization.

65139485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13027902.

The product of its digits is 129600, while the sum is 41.

The square root of 65139485 is about 8070.9036049255. The cubic root of 65139485 is about 402.3599759837.

The spelling of 65139485 in words is "sixty-five million, one hundred thirty-nine thousand, four hundred eighty-five".