65390109 has 16 divisors (see below), whose sum is σ = 93833280. Its totient is φ = 40354560.

The previous prime is 65390107. The next prime is 65390111. The reversal of 65390109 is 90109356.

It is an interprime number because it is at equal distance from previous prime (65390107) and next prime (65390111).

It is not a de Polignac number, because 65390109 - 2¹ = 65390107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65390109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65390107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7399 + ... + 13620.

It is an arithmetic number, because the mean of its divisors is an integer number (5864580).

Almost surely, 2^65390109 is an apocalyptic number.

It is an amenable number.

65390109 is a deficient number, since it is larger than the sum of its proper divisors (28443171).

65390109 is a wasteful number, since it uses less digits than its factorization.

65390109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21100.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 65390109 is about 8086.4150895190. The cubic root of 65390109 is about 402.8753419136.

The spelling of 65390109 in words is "sixty-five million, three hundred ninety thousand, one hundred nine".