65487391 has 2 divisors, whose sum is σ = 65487392. Its totient is φ = 65487390.

The previous prime is 65487379. The next prime is 65487427. The reversal of 65487391 is 19378456.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65487391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65487691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32743695 + 32743696.

It is an arithmetic number, because the mean of its divisors is an integer number (32743696).

Almost surely, 2^65487391 is an apocalyptic number.

65487391 is a deficient number, since it is larger than the sum of its proper divisors (1).

65487391 is an equidigital number, since it uses as much as digits as its factorization.

65487391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 65487391 is about 8092.4280040047. The cubic root of 65487391 is about 403.0750311319.

The spelling of 65487391 in words is "sixty-five million, four hundred eighty-seven thousand, three hundred ninety-one".