641238499 has 8 divisors (see below), whose sum is σ = 700078320. Its totient is φ = 582489600.

The previous prime is 641238473. The next prime is 641238509. The reversal of 641238499 is 994832146.

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

It is not a de Polignac number, because 641238499 - 2¹¹ = 641236451 is a prime.

It is a super-2 number, since 2×641238499² = 822373625199546002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641232499) 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, 7534 + ... + 36595.

It is an arithmetic number, because the mean of its divisors is an integer number (87509790).

Almost surely, 2^641238499 is an apocalyptic number.

641238499 is a deficient number, since it is larger than the sum of its proper divisors (58839821).

641238499 is a wasteful number, since it uses less digits than its factorization.

641238499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45461.

The product of its digits is 373248, while the sum is 46.

The square root of 641238499 is about 25322.6874363682. The cubic root of 641238499 is about 862.3294064062.

The spelling of 641238499 in words is "six hundred forty-one million, two hundred thirty-eight thousand, four hundred ninety-nine".