53438891 has 4 divisors (see below), whose sum is σ = 58296984. Its totient is φ = 48580800.

The previous prime is 53438881. The next prime is 53438897. The reversal of 53438891 is 19883435.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53438891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53438897) 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, 2429030 + ... + 2429051.

It is an arithmetic number, because the mean of its divisors is an integer number (14574246).

Almost surely, 2^53438891 is an apocalyptic number.

53438891 is a deficient number, since it is larger than the sum of its proper divisors (4858093).

53438891 is a wasteful number, since it uses less digits than its factorization.

53438891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4858092.

The product of its digits is 103680, while the sum is 41.

The square root of 53438891 is about 7310.1909003801. The cubic root of 53438891 is about 376.6625818163.

The spelling of 53438891 in words is "fifty-three million, four hundred thirty-eight thousand, eight hundred ninety-one".