53139049 has 4 divisors (see below), whose sum is σ = 54971460. Its totient is φ = 51306640.

The previous prime is 53139017. The next prime is 53139061. The reversal of 53139049 is 94093135.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34433424 + 18705625 = 5868^2 + 4325^2 .

It is a cyclic number.

It is not a de Polignac number, because 53139049 - 2⁵ = 53139017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53133049) 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, 916162 + ... + 916219.

It is an arithmetic number, because the mean of its divisors is an integer number (13742865).

Almost surely, 2^53139049 is an apocalyptic number.

It is an amenable number.

53139049 is a deficient number, since it is larger than the sum of its proper divisors (1832411).

53139049 is a wasteful number, since it uses less digits than its factorization.

53139049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832410.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 53139049 is about 7289.6535582975. The cubic root of 53139049 is about 375.9567840213.

The spelling of 53139049 in words is "fifty-three million, one hundred thirty-nine thousand, forty-nine".