65698389 has 6 divisors (see below), whose sum is σ = 94897686. Its totient is φ = 43798920.

The previous prime is 65698363. The next prime is 65698411. The reversal of 65698389 is 98389656.

It can be written as a sum of positive squares in only one way, i.e., 54022500 + 11675889 = 7350^2 + 3417^2 .

It is not a de Polignac number, because 65698389 - 2⁷ = 65698261 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65698309) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3649902 + ... + 3649919.

It is an arithmetic number, because the mean of its divisors is an integer number (15816281).

Almost surely, 2^65698389 is an apocalyptic number.

It is an amenable number.

65698389 is a deficient number, since it is larger than the sum of its proper divisors (29199297).

65698389 is a wasteful number, since it uses less digits than its factorization.

65698389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7299827 (or 7299824 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 65698389 is about 8105.4542747461. The cubic root of 65698389 is about 403.5074647486.

The spelling of 65698389 in words is "sixty-five million, six hundred ninety-eight thousand, three hundred eighty-nine".