53139894 has 8 divisors (see below), whose sum is σ = 106279800. Its totient is φ = 17713296.

The previous prime is 53139893. The next prime is 53139907. The reversal of 53139894 is 49893135.

It is a sphenic number, since it is the product of 3 distinct primes.

53139894 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53139893) 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, 4428319 + ... + 4428330.

It is an arithmetic number, because the mean of its divisors is an integer number (13284975).

Almost surely, 2^53139894 is an apocalyptic number.

53139894 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53139894 is a wasteful number, since it uses less digits than its factorization.

53139894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8856654.

The product of its digits is 116640, while the sum is 42.

The square root of 53139894 is about 7289.7115169258. The cubic root of 53139894 is about 375.9587767919.

The spelling of 53139894 in words is "fifty-three million, one hundred thirty-nine thousand, eight hundred ninety-four".