65404399 has 2 divisors, whose sum is σ = 65404400. Its totient is φ = 65404398.

The previous prime is 65404397. The next prime is 65404411. The reversal of 65404399 is 99340456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65404399 - 2¹ = 65404397 is a prime.

Together with 65404397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65404397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32702199 + 32702200.

It is an arithmetic number, because the mean of its divisors is an integer number (32702200).

Almost surely, 2^65404399 is an apocalyptic number.

65404399 is a deficient number, since it is larger than the sum of its proper divisors (1).

65404399 is an equidigital number, since it uses as much as digits as its factorization.

65404399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 65404399 is about 8087.2986219133. The cubic root of 65404399 is about 402.9046871739.

The spelling of 65404399 in words is "sixty-five million, four hundred four thousand, three hundred ninety-nine".