65289997 has 4 divisors (see below), whose sum is σ = 65502976. Its totient is φ = 65077020.

The previous prime is 65289989. The next prime is 65290037. The reversal of 65289997 is 79998256.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 65289997 - 2³ = 65289989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65289907) 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, 106029 + ... + 106642.

It is an arithmetic number, because the mean of its divisors is an integer number (16375744).

Almost surely, 2^65289997 is an apocalyptic number.

It is an amenable number.

65289997 is a deficient number, since it is larger than the sum of its proper divisors (212979).

65289997 is a wasteful number, since it uses less digits than its factorization.

65289997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212978.

The product of its digits is 2449440, while the sum is 55.

The square root of 65289997 is about 8080.2225835679. Note that the first 3 decimals coincide. The cubic root of 65289997 is about 402.6696367113.

The spelling of 65289997 in words is "sixty-five million, two hundred eighty-nine thousand, nine hundred ninety-seven".