65289691 has 4 divisors (see below), whose sum is σ = 66264232. Its totient is φ = 64315152.

The previous prime is 65289677. The next prime is 65289737. The reversal of 65289691 is 19698256.

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 65289691 - 2¹⁹ = 64765403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65289641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487170 + ... + 487303.

It is an arithmetic number, because the mean of its divisors is an integer number (16566058).

Almost surely, 2^65289691 is an apocalyptic number.

65289691 is a deficient number, since it is larger than the sum of its proper divisors (974541).

65289691 is an equidigital number, since it uses as much as digits as its factorization.

65289691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974540.

The product of its digits is 233280, while the sum is 46.

The square root of 65289691 is about 8080.2036484237. The cubic root of 65289691 is about 402.6690076353.

The spelling of 65289691 in words is "sixty-five million, two hundred eighty-nine thousand, six hundred ninety-one".