506751391 has 8 divisors (see below), whose sum is σ = 516728160. Its totient is φ = 496790112.

The previous prime is 506751379. The next prime is 506751397. The reversal of 506751391 is 193157605.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506751391 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 506751391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506751397) 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 7 ways as a sum of consecutive naturals, for example, 79561 + ... + 85693.

It is an arithmetic number, because the mean of its divisors is an integer number (64591020).

Almost surely, 2^506751391 is an apocalyptic number.

506751391 is a deficient number, since it is larger than the sum of its proper divisors (9976769).

506751391 is a wasteful number, since it uses less digits than its factorization.

506751391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7745.

The product of its (nonzero) digits is 28350, while the sum is 37.

The square root of 506751391 is about 22511.1392648173. The cubic root of 506751391 is about 797.2569548581.

The spelling of 506751391 in words is "five hundred six million, seven hundred fifty-one thousand, three hundred ninety-one".