53347891 has 4 divisors (see below), whose sum is σ = 53362512. Its totient is φ = 53333272.

The previous prime is 53347873. The next prime is 53347901. The reversal of 53347891 is 19874335.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 53347891 - 2⁹ = 53347379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53347841) 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, 3210 + ... + 10816.

It is an arithmetic number, because the mean of its divisors is an integer number (13340628).

Almost surely, 2^53347891 is an apocalyptic number.

53347891 is a deficient number, since it is larger than the sum of its proper divisors (14621).

53347891 is an equidigital number, since it uses as much as digits as its factorization.

53347891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14620.

The product of its digits is 90720, while the sum is 40.

The square root of 53347891 is about 7303.9640607002. The cubic root of 53347891 is about 376.4486566589.

It can be divided in two parts, 5334 and 7891, that added together give a square (13225 = 115²).

The spelling of 53347891 in words is "fifty-three million, three hundred forty-seven thousand, eight hundred ninety-one".