53405843 has 2 divisors, whose sum is σ = 53405844. Its totient is φ = 53405842.

The previous prime is 53405813. The next prime is 53405879. The reversal of 53405843 is 34850435.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53405843 - 2⁸ = 53405587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (53405813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26702921 + 26702922.

It is an arithmetic number, because the mean of its divisors is an integer number (26702922).

Almost surely, 2^53405843 is an apocalyptic number.

53405843 is a deficient number, since it is larger than the sum of its proper divisors (1).

53405843 is an equidigital number, since it uses as much as digits as its factorization.

53405843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 53405843 is about 7307.9301447127. The cubic root of 53405843 is about 376.5849198258.

The spelling of 53405843 in words is "fifty-three million, four hundred five thousand, eight hundred forty-three".