418000991 has 8 divisors (see below), whose sum is σ = 420663840. Its totient is φ = 415346688.

The previous prime is 418000987. The next prime is 418000997. The reversal of 418000991 is 199000814.

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 418000991 - 2² = 418000987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (418000997) 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, 115670 + ... + 119228.

It is an arithmetic number, because the mean of its divisors is an integer number (52582980).

Almost surely, 2^418000991 is an apocalyptic number.

418000991 is a deficient number, since it is larger than the sum of its proper divisors (2662849).

418000991 is a wasteful number, since it uses less digits than its factorization.

418000991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4273.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 418000991 is about 20445.0725359437. The cubic root of 418000991 is about 747.6972278531.

The spelling of 418000991 in words is "four hundred eighteen million, nine hundred ninety-one", and thus it is an aban number.