506489397 has 4 divisors (see below), whose sum is σ = 675319200. Its totient is φ = 337659596.

The previous prime is 506489393. The next prime is 506489443. The reversal of 506489397 is 793984605.

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 506489397 - 2² = 506489393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506489393) 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, 84414897 + ... + 84414902.

It is an arithmetic number, because the mean of its divisors is an integer number (168829800).

Almost surely, 2^506489397 is an apocalyptic number.

It is an amenable number.

506489397 is a deficient number, since it is larger than the sum of its proper divisors (168829803).

506489397 is a wasteful number, since it uses less digits than its factorization.

506489397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168829802.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The square root of 506489397 is about 22505.3193045555. The cubic root of 506489397 is about 797.1195353729.

The spelling of 506489397 in words is "five hundred six million, four hundred eighty-nine thousand, three hundred ninety-seven".