65277491 has 2 divisors, whose sum is σ = 65277492. Its totient is φ = 65277490.

The previous prime is 65277481. The next prime is 65277523. The reversal of 65277491 is 19477256.

65277491 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 a de Polignac number, because none of the positive numbers 2^k-65277491 is a prime.

It is a super-2 number, since 2×65277491² = 8522301662510162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65277481) 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, 32638745 + 32638746.

It is an arithmetic number, because the mean of its divisors is an integer number (32638746).

Almost surely, 2^65277491 is an apocalyptic number.

65277491 is a deficient number, since it is larger than the sum of its proper divisors (1).

65277491 is an equidigital number, since it uses as much as digits as its factorization.

65277491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 65277491 is about 8079.4486816861. The cubic root of 65277491 is about 402.6439252278.

The spelling of 65277491 in words is "sixty-five million, two hundred seventy-seven thousand, four hundred ninety-one".