401982671 has 2 divisors, whose sum is σ = 401982672. Its totient is φ = 401982670.

The previous prime is 401982667. The next prime is 401982683. The reversal of 401982671 is 176289104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 401982671 - 2² = 401982667 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401982631) 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 as a sum of consecutive naturals, namely, 200991335 + 200991336.

It is an arithmetic number, because the mean of its divisors is an integer number (200991336).

Almost surely, 2^401982671 is an apocalyptic number.

401982671 is a deficient number, since it is larger than the sum of its proper divisors (1).

401982671 is an equidigital number, since it uses as much as digits as its factorization.

401982671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 401982671 is about 20049.5055051241. The cubic root of 401982671 is about 738.0216642803.

The spelling of 401982671 in words is "four hundred one million, nine hundred eighty-two thousand, six hundred seventy-one".