53780591 has 4 divisors (see below), whose sum is σ = 53990112. Its totient is φ = 53571072.

The previous prime is 53780557. The next prime is 53780641. The reversal of 53780591 is 19508735.

53780591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 53780591 - 2⁶ = 53780527 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 (53780501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104375 + ... + 104888.

It is an arithmetic number, because the mean of its divisors is an integer number (13497528).

Almost surely, 2^53780591 is an apocalyptic number.

53780591 is a deficient number, since it is larger than the sum of its proper divisors (209521).

53780591 is a wasteful number, since it uses less digits than its factorization.

53780591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209520.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 53780591 is about 7333.5251414310. The cubic root of 53780591 is about 377.4636978088.

The spelling of 53780591 in words is "fifty-three million, seven hundred eighty thousand, five hundred ninety-one".