1999227641 has 8 divisors (see below), whose sum is σ = 2036670720. Its totient is φ = 1962088128.

The previous prime is 1999227613. The next prime is 1999227647. The reversal of 1999227641 is 1467229991.

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

It is a cyclic number.

It is not a de Polignac number, because 1999227641 - 2⁶ = 1999227577 is a prime.

It is a super-2 number, since 2×1999227641² = 7993822321076849762, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1999227641.

It is not an unprimeable number, because it can be changed into a prime (1999227647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62576 + ... + 88961.

It is an arithmetic number, because the mean of its divisors is an integer number (254583840).

Almost surely, 2^1999227641 is an apocalyptic number.

It is an amenable number.

1999227641 is a deficient number, since it is larger than the sum of its proper divisors (37443079).

1999227641 is a wasteful number, since it uses less digits than its factorization.

1999227641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151783.

The product of its digits is 489888, while the sum is 50.

The square root of 1999227641 is about 44712.7234800118. The cubic root of 1999227641 is about 1259.7588437858.

The spelling of 1999227641 in words is "one billion, nine hundred ninety-nine million, two hundred twenty-seven thousand, six hundred forty-one".