487136647 has 4 divisors (see below), whose sum is σ = 487777536. Its totient is φ = 486495760.

The previous prime is 487136633. The next prime is 487136651. The reversal of 487136647 is 746631784.

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 487136647 - 2¹⁵ = 487103879 is a prime.

It is a super-2 number, since 2×487136647² = 474604225700805218, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 487136597 and 487136606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (487136147) 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, 319303 + ... + 320824.

It is an arithmetic number, because the mean of its divisors is an integer number (121944384).

Almost surely, 2^487136647 is an apocalyptic number.

487136647 is a deficient number, since it is larger than the sum of its proper divisors (640889).

487136647 is an equidigital number, since it uses as much as digits as its factorization.

487136647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640888.

The product of its digits is 677376, while the sum is 46.

The square root of 487136647 is about 22071.1723068803. The cubic root of 487136647 is about 786.8348747562.

The spelling of 487136647 in words is "four hundred eighty-seven million, one hundred thirty-six thousand, six hundred forty-seven".