65709131 has 4 divisors (see below), whose sum is σ = 69574392. Its totient is φ = 61843872.

The previous prime is 65709121. The next prime is 65709167. The reversal of 65709131 is 13190756.

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

It is a cyclic number.

It is not a de Polignac number, because 65709131 - 2¹⁰ = 65708107 is a prime.

It is a super-2 number, since 2×65709131² = 8635379793550322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65709121) 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, 1932605 + ... + 1932638.

It is an arithmetic number, because the mean of its divisors is an integer number (17393598).

Almost surely, 2^65709131 is an apocalyptic number.

65709131 is a deficient number, since it is larger than the sum of its proper divisors (3865261).

65709131 is a wasteful number, since it uses less digits than its factorization.

65709131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3865260.

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 65709131 is about 8106.1168878816. The cubic root of 65709131 is about 403.5294553486.

Adding to 65709131 its reverse (13190756), we get a palindrome (78899887).

The spelling of 65709131 in words is "sixty-five million, seven hundred nine thousand, one hundred thirty-one".