65340491 has 2 divisors, whose sum is σ = 65340492. Its totient is φ = 65340490.

The previous prime is 65340479. The next prime is 65340551. The reversal of 65340491 is 19404356.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65340491 - 2⁶ = 65340427 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (65340391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32670245 + 32670246.

It is an arithmetic number, because the mean of its divisors is an integer number (32670246).

Almost surely, 2^65340491 is an apocalyptic number.

65340491 is a deficient number, since it is larger than the sum of its proper divisors (1).

65340491 is an equidigital number, since it uses as much as digits as its factorization.

65340491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 65340491 is about 8083.3465223260. The cubic root of 65340491 is about 402.7734155557.

The spelling of 65340491 in words is "sixty-five million, three hundred forty thousand, four hundred ninety-one".