520093621 has 4 divisors (see below), whose sum is σ = 520284352. Its totient is φ = 519902892.

The previous prime is 520093543. The next prime is 520093649. The reversal of 520093621 is 126390025.

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 520093621 - 2¹³ = 520085429 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 520093621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520093421) 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, 91215 + ... + 96748.

It is an arithmetic number, because the mean of its divisors is an integer number (130071088).

Almost surely, 2^520093621 is an apocalyptic number.

It is an amenable number.

520093621 is a deficient number, since it is larger than the sum of its proper divisors (190731).

520093621 is a wasteful number, since it uses less digits than its factorization.

520093621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190730.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 520093621 is about 22805.5611858161. The cubic root of 520093621 is about 804.1934083560.

The spelling of 520093621 in words is "five hundred twenty million, ninety-three thousand, six hundred twenty-one".