401887711 has 4 divisors (see below), whose sum is σ = 409470552. Its totient is φ = 394304872.

The previous prime is 401887697. The next prime is 401887721. The reversal of 401887711 is 117788104.

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 401887711 - 2⁵ = 401887679 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 (401887721) 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 3 ways as a sum of consecutive naturals, for example, 3791341 + ... + 3791446.

It is an arithmetic number, because the mean of its divisors is an integer number (102367638).

Almost surely, 2^401887711 is an apocalyptic number.

401887711 is a deficient number, since it is larger than the sum of its proper divisors (7582841).

401887711 is an equidigital number, since it uses as much as digits as its factorization.

401887711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582840.

The product of its (nonzero) digits is 12544, while the sum is 37.

The square root of 401887711 is about 20047.1372270457. The cubic root of 401887711 is about 737.9635456419.

The spelling of 401887711 in words is "four hundred one million, eight hundred eighty-seven thousand, seven hundred eleven".