65297945 has 4 divisors (see below), whose sum is σ = 78357540. Its totient is φ = 52238352.

The previous prime is 65297941. The next prime is 65297957. The reversal of 65297945 is 54979256.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28185481 + 37112464 = 5309^2 + 6092^2 .

It is a cyclic number.

It is not a de Polignac number, because 65297945 - 2² = 65297941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65297945.

It is not an unprimeable number, because it can be changed into a prime (65297941) 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, 6529790 + ... + 6529799.

It is an arithmetic number, because the mean of its divisors is an integer number (19589385).

Almost surely, 2^65297945 is an apocalyptic number.

It is an amenable number.

65297945 is a deficient number, since it is larger than the sum of its proper divisors (13059595).

65297945 is a wasteful number, since it uses less digits than its factorization.

65297945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13059594.

The product of its digits is 680400, while the sum is 47.

The square root of 65297945 is about 8080.7143867359. The cubic root of 65297945 is about 402.6859755511.

The spelling of 65297945 in words is "sixty-five million, two hundred ninety-seven thousand, nine hundred forty-five".