53375891 has 4 divisors (see below), whose sum is σ = 54677784. Its totient is φ = 52074000.

The previous prime is 53375851. The next prime is 53375897. The reversal of 53375891 is 19857335.

It is a happy number.

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 53375891 - 2⁶ = 53375827 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 1301851 = 53375891 / (5 + 3 + 3 + 7 + 5 + 8 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53375897) 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, 650885 + ... + 650966.

It is an arithmetic number, because the mean of its divisors is an integer number (13669446).

Almost surely, 2^53375891 is an apocalyptic number.

53375891 is a deficient number, since it is larger than the sum of its proper divisors (1301893).

53375891 is a wasteful number, since it uses less digits than its factorization.

53375891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301892.

The product of its digits is 113400, while the sum is 41.

The square root of 53375891 is about 7305.8805766314. The cubic root of 53375891 is about 376.5145056776.

The spelling of 53375891 in words is "fifty-three million, three hundred seventy-five thousand, eight hundred ninety-one".