65291491 has 2 divisors, whose sum is σ = 65291492. Its totient is φ = 65291490.

The previous prime is 65291483. The next prime is 65291519. The reversal of 65291491 is 19419256.

65291491 is nontrivially palindromic in base 16.

65291491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65291491 - 2³ = 65291483 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65291491.

It is not a weakly prime, because it can be changed into another prime (65291431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32645745 + 32645746.

It is an arithmetic number, because the mean of its divisors is an integer number (32645746).

Almost surely, 2^65291491 is an apocalyptic number.

65291491 is a deficient number, since it is larger than the sum of its proper divisors (1).

65291491 is an equidigital number, since it uses as much as digits as its factorization.

65291491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 37.

The square root of 65291491 is about 8080.3150309873. The cubic root of 65291491 is about 402.6727080539.

The spelling of 65291491 in words is "sixty-five million, two hundred ninety-one thousand, four hundred ninety-one".