53405663 has 2 divisors, whose sum is σ = 53405664. Its totient is φ = 53405662.

The previous prime is 53405629. The next prime is 53405711. The reversal of 53405663 is 36650435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53405663 - 2¹² = 53401567 is a prime.

It is a Chen prime.

It is equal to p_3192881 and since 53405663 and 3192881 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53405263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26702831 + 26702832.

It is an arithmetic number, because the mean of its divisors is an integer number (26702832).

Almost surely, 2^53405663 is an apocalyptic number.

53405663 is a deficient number, since it is larger than the sum of its proper divisors (1).

53405663 is an equidigital number, since it uses as much as digits as its factorization.

53405663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 53405663 is about 7307.9178293136. The cubic root of 53405663 is about 376.5844967425.

The spelling of 53405663 in words is "fifty-three million, four hundred five thousand, six hundred sixty-three".