401277647 has 2 divisors, whose sum is σ = 401277648. Its totient is φ = 401277646.

The previous prime is 401277637. The next prime is 401277649. The reversal of 401277647 is 746772104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401277647 - 2⁴ = 401277631 is a prime.

It is a super-2 number, since 2×401277647² = 322047499963713218, which contains 22 as substring.

Together with 401277649, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 401277647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401277649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200638823 + 200638824.

It is an arithmetic number, because the mean of its divisors is an integer number (200638824).

Almost surely, 2^401277647 is an apocalyptic number.

401277647 is a deficient number, since it is larger than the sum of its proper divisors (1).

401277647 is an equidigital number, since it uses as much as digits as its factorization.

401277647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 401277647 is about 20031.9157096869. The cubic root of 401277647 is about 737.5899479299.

It can be divided in two parts, 40127 and 7647, that added together give a palindrome (47774).

The spelling of 401277647 in words is "four hundred one million, two hundred seventy-seven thousand, six hundred forty-seven".