53909943 has 4 divisors (see below), whose sum is σ = 71879928. Its totient is φ = 35939960.

The previous prime is 53909923. The next prime is 53909963. The reversal of 53909943 is 34990935.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (53909923) and next prime (53909963).

It is a cyclic number.

It is not a de Polignac number, because 53909943 - 2⁶ = 53909879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53909895 and 53909904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53909903) 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, 8984988 + ... + 8984993.

It is an arithmetic number, because the mean of its divisors is an integer number (17969982).

Almost surely, 2^53909943 is an apocalyptic number.

53909943 is a deficient number, since it is larger than the sum of its proper divisors (17969985).

53909943 is a wasteful number, since it uses less digits than its factorization.

53909943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17969984.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 53909943 is about 7342.3390687165. The cubic root of 53909943 is about 377.7660782196.

The spelling of 53909943 in words is "fifty-three million, nine hundred nine thousand, nine hundred forty-three".