52391737 has 4 divisors (see below), whose sum is σ = 52931956. Its totient is φ = 51851520.

The previous prime is 52391707. The next prime is 52391743. The reversal of 52391737 is 73719325.

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 22240656 + 30151081 = 4716^2 + 5491^2 .

It is a cyclic number.

It is not a de Polignac number, because 52391737 - 2⁷ = 52391609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52391696 and 52391705.

It is not an unprimeable number, because it can be changed into a prime (52391707) 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, 269964 + ... + 270157.

It is an arithmetic number, because the mean of its divisors is an integer number (13232989).

Almost surely, 2^52391737 is an apocalyptic number.

It is an amenable number.

52391737 is a deficient number, since it is larger than the sum of its proper divisors (540219).

52391737 is an equidigital number, since it uses as much as digits as its factorization.

52391737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540218.

The product of its digits is 39690, while the sum is 37.

The square root of 52391737 is about 7238.2136608420. The cubic root of 52391737 is about 374.1860556341.

The spelling of 52391737 in words is "fifty-two million, three hundred ninety-one thousand, seven hundred thirty-seven".