53921783 has 4 divisors (see below), whose sum is σ = 54204288. Its totient is φ = 53639280.

The previous prime is 53921771. The next prime is 53921789. The reversal of 53921783 is 38712935.

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

It is a cyclic number.

It is not a de Polignac number, because 53921783 - 2⁴ = 53921767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53921789) 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, 140966 + ... + 141347.

It is an arithmetic number, because the mean of its divisors is an integer number (13551072).

Almost surely, 2^53921783 is an apocalyptic number.

53921783 is a deficient number, since it is larger than the sum of its proper divisors (282505).

53921783 is a wasteful number, since it uses less digits than its factorization.

53921783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282504.

The product of its digits is 45360, while the sum is 38.

The square root of 53921783 is about 7343.1453070193. The cubic root of 53921783 is about 377.7937318874.

It can be divided in two parts, 539 and 21783, that added together give a palindrome (22322).

The spelling of 53921783 in words is "fifty-three million, nine hundred twenty-one thousand, seven hundred eighty-three".