401311847 has 2 divisors, whose sum is σ = 401311848. Its totient is φ = 401311846.

The previous prime is 401311811. The next prime is 401311849. The reversal of 401311847 is 748113104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401311847 is a prime.

It is a super-2 number, since 2×401311847² = 322102397085102818, which contains 22 as substring.

Together with 401311849, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401311849) 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, 200655923 + 200655924.

It is an arithmetic number, because the mean of its divisors is an integer number (200655924).

Almost surely, 2^401311847 is an apocalyptic number.

401311847 is a deficient number, since it is larger than the sum of its proper divisors (1).

401311847 is an equidigital number, since it uses as much as digits as its factorization.

401311847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 401311847 is about 20032.7693292765. The cubic root of 401311847 is about 737.6109017174.

The spelling of 401311847 in words is "four hundred one million, three hundred eleven thousand, eight hundred forty-seven".