641270499 has 4 divisors (see below), whose sum is σ = 855027336. Its totient is φ = 427513664.

The previous prime is 641270473. The next prime is 641270507. The reversal of 641270499 is 994072146.

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 641270499 - 2⁹ = 641269987 is a prime.

It is a super-2 number, since 2×641270499² = 822455705775418002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 641270499.

It is not an unprimeable number, because it can be changed into a prime (641270419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106878414 + ... + 106878419.

It is an arithmetic number, because the mean of its divisors is an integer number (213756834).

Almost surely, 2^641270499 is an apocalyptic number.

641270499 is a deficient number, since it is larger than the sum of its proper divisors (213756837).

641270499 is a wasteful number, since it uses less digits than its factorization.

641270499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213756836.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 641270499 is about 25323.3192729547. The cubic root of 641270499 is about 862.3437505657.

The spelling of 641270499 in words is "six hundred forty-one million, two hundred seventy thousand, four hundred ninety-nine".