53139197 has 4 divisors (see below), whose sum is σ = 53155200. Its totient is φ = 53123196.

The previous prime is 53139167. The next prime is 53139209. The reversal of 53139197 is 79193135.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53139197 - 2¹² = 53135101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53139197.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53139137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947 + ... + 10352.

It is an arithmetic number, because the mean of its divisors is an integer number (13288800).

Almost surely, 2^53139197 is an apocalyptic number.

It is an amenable number.

53139197 is a deficient number, since it is larger than the sum of its proper divisors (16003).

53139197 is a wasteful number, since it uses less digits than its factorization.

53139197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16002.

The product of its digits is 25515, while the sum is 38.

The square root of 53139197 is about 7289.6637096645. The cubic root of 53139197 is about 375.9571330525.

The spelling of 53139197 in words is "fifty-three million, one hundred thirty-nine thousand, one hundred ninety-seven".