401086643 has 4 divisors (see below), whose sum is σ = 402000720. Its totient is φ = 400172568.

The previous prime is 401086639. The next prime is 401086657. The reversal of 401086643 is 346680104.

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 401086643 - 2² = 401086639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401086603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456380 + ... + 457257.

It is an arithmetic number, because the mean of its divisors is an integer number (100500180).

Almost surely, 2^401086643 is an apocalyptic number.

401086643 is a deficient number, since it is larger than the sum of its proper divisors (914077).

401086643 is an equidigital number, since it uses as much as digits as its factorization.

401086643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914076.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 401086643 is about 20027.1476501273. The cubic root of 401086643 is about 737.4729009673.

The spelling of 401086643 in words is "four hundred one million, eighty-six thousand, six hundred forty-three".