401401020407 has 2 divisors, whose sum is σ = 401401020408. Its totient is φ = 401401020406.

The previous prime is 401401020373. The next prime is 401401020409. The reversal of 401401020407 is 704020104104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401401020407 - 2⁶ = 401401020343 is a prime.

It is a super-2 number, since 2×401401020407² (a number of 24 digits) contains 22 as substring.

Together with 401401020409, 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 (401401020409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200700510203 + 200700510204.

It is an arithmetic number, because the mean of its divisors is an integer number (200700510204).

Almost surely, 2^401401020407 is an apocalyptic number.

401401020407 is a deficient number, since it is larger than the sum of its proper divisors (1).

401401020407 is an equidigital number, since it uses as much as digits as its factorization.

401401020407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

The spelling of 401401020407 in words is "four hundred one billion, four hundred one million, twenty thousand, four hundred seven".