641087998 has 8 divisors (see below), whose sum is σ = 992652480. Its totient is φ = 310203840.

The previous prime is 641087981. The next prime is 641088023. The reversal of 641087998 is 899780146.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5170003 + ... + 5170126.

It is an arithmetic number, because the mean of its divisors is an integer number (124081560).

Almost surely, 2^641087998 is an apocalyptic number.

641087998 is a deficient number, since it is larger than the sum of its proper divisors (351564482).

641087998 is a wasteful number, since it uses less digits than its factorization.

641087998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340162.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 641087998 is about 25319.7155987187. The cubic root of 641087998 is about 862.2619371817.

The spelling of 641087998 in words is "six hundred forty-one million, eighty-seven thousand, nine hundred ninety-eight".