65490447 has 16 divisors (see below), whose sum is σ = 96468480. Its totient is φ = 39187200.

The previous prime is 65490433. The next prime is 65490449. The reversal of 65490447 is 74409456.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-65490447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65490449) 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, 9954 + ... + 15167.

It is an arithmetic number, because the mean of its divisors is an integer number (6029280).

Almost surely, 2^65490447 is an apocalyptic number.

65490447 is a deficient number, since it is larger than the sum of its proper divisors (30978033).

65490447 is a wasteful number, since it uses less digits than its factorization.

65490447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25214.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 65490447 is about 8092.6168202875. The cubic root of 65490447 is about 403.0813009299.

The spelling of 65490447 in words is "sixty-five million, four hundred ninety thousand, four hundred forty-seven".