505253987 has 4 divisors (see below), whose sum is σ = 577433136. Its totient is φ = 433074840.

The previous prime is 505253971. The next prime is 505254007. The reversal of 505253987 is 789352505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505253987 - 2⁴ = 505253971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505253927) 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, 36089564 + ... + 36089577.

It is an arithmetic number, because the mean of its divisors is an integer number (144358284).

Almost surely, 2^505253987 is an apocalyptic number.

505253987 is a deficient number, since it is larger than the sum of its proper divisors (72179149).

505253987 is an equidigital number, since it uses as much as digits as its factorization.

505253987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72179148.

The product of its (nonzero) digits is 378000, while the sum is 44.

The square root of 505253987 is about 22477.8554804501. The cubic root of 505253987 is about 796.4709063271.

The spelling of 505253987 in words is "five hundred five million, two hundred fifty-three thousand, nine hundred eighty-seven".