65749391 has 2 divisors, whose sum is σ = 65749392. Its totient is φ = 65749390.

The previous prime is 65749303. The next prime is 65749429. The reversal of 65749391 is 19394756.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65749391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65749301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32874695 + 32874696.

It is an arithmetic number, because the mean of its divisors is an integer number (32874696).

Almost surely, 2^65749391 is an apocalyptic number.

65749391 is a deficient number, since it is larger than the sum of its proper divisors (1).

65749391 is an equidigital number, since it uses as much as digits as its factorization.

65749391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 65749391 is about 8108.5998174777. The cubic root of 65749391 is about 403.6118527199.

The spelling of 65749391 in words is "sixty-five million, seven hundred forty-nine thousand, three hundred ninety-one".