506421687 has 16 divisors (see below), whose sum is σ = 752578560. Its totient is φ = 301030272.

The previous prime is 506421677. The next prime is 506421737. The reversal of 506421687 is 786124605.

It is not a de Polignac number, because 506421687 - 2²⁷ = 372203959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506421607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260343 + ... + 262280.

It is an arithmetic number, because the mean of its divisors is an integer number (47036160).

Almost surely, 2^506421687 is an apocalyptic number.

506421687 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

506421687 is a deficient number, since it is larger than the sum of its proper divisors (246156873).

506421687 is a wasteful number, since it uses less digits than its factorization.

506421687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522662.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 506421687 is about 22503.8149432491. The cubic root of 506421687 is about 797.0840128332.

The spelling of 506421687 in words is "five hundred six million, four hundred twenty-one thousand, six hundred eighty-seven".