641487087 has 8 divisors (see below), whose sum is σ = 950351280. Its totient is φ = 427658040.

The previous prime is 641487073. The next prime is 641487131. The reversal of 641487087 is 780784146.

It is not a de Polignac number, because 641487087 - 2⁴ = 641487071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641487017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11879364 + ... + 11879417.

It is an arithmetic number, because the mean of its divisors is an integer number (118793910).

Almost surely, 2^641487087 is an apocalyptic number.

641487087 is a deficient number, since it is larger than the sum of its proper divisors (308864193).

641487087 is a wasteful number, since it uses less digits than its factorization.

641487087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23758790 (or 23758784 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 641487087 is about 25327.5953655297. The cubic root of 641487087 is about 862.4408246736.

The spelling of 641487087 in words is "six hundred forty-one million, four hundred eighty-seven thousand, eighty-seven".