53405869 has 4 divisors (see below), whose sum is σ = 58260960. Its totient is φ = 48550780.

The previous prime is 53405843. The next prime is 53405879. The reversal of 53405869 is 96850435.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53405869 - 2⁷ = 53405741 is a prime.

It is a super-2 number, since 2×53405869² = 5704373687290322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53405879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2427529 + ... + 2427550.

It is an arithmetic number, because the mean of its divisors is an integer number (14565240).

Almost surely, 2^53405869 is an apocalyptic number.

It is an amenable number.

53405869 is a deficient number, since it is larger than the sum of its proper divisors (4855091).

53405869 is a wasteful number, since it uses less digits than its factorization.

53405869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4855090.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 53405869 is about 7307.9319236019. The cubic root of 53405869 is about 376.5849809378.

The spelling of 53405869 in words is "fifty-three million, four hundred five thousand, eight hundred sixty-nine".