53891287 has 4 divisors (see below), whose sum is σ = 53906040. Its totient is φ = 53876536.

The previous prime is 53891267. The next prime is 53891291. The reversal of 53891287 is 78219835.

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 53891287 - 2²³ = 45502679 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 (53891267) 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, 2613 + ... + 10705.

It is an arithmetic number, because the mean of its divisors is an integer number (13476510).

Almost surely, 2^53891287 is an apocalyptic number.

53891287 is a deficient number, since it is larger than the sum of its proper divisors (14753).

53891287 is an equidigital number, since it uses as much as digits as its factorization.

53891287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14752.

The product of its digits is 120960, while the sum is 43.

The square root of 53891287 is about 7341.0685189555. The cubic root of 53891287 is about 377.7224967905.

The spelling of 53891287 in words is "fifty-three million, eight hundred ninety-one thousand, two hundred eighty-seven".