401440007 has 2 divisors, whose sum is σ = 401440008. Its totient is φ = 401440006.

The previous prime is 401439991. The next prime is 401440009. The reversal of 401440007 is 700044104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 401440007 - 2⁴ = 401439991 is a prime.

It is a super-2 number, since 2×401440007² = 322308158440320098, which contains 22 as substring.

Together with 401440009, 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 (401440009) 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, 200720003 + 200720004.

It is an arithmetic number, because the mean of its divisors is an integer number (200720004).

Almost surely, 2^401440007 is an apocalyptic number.

401440007 is a deficient number, since it is larger than the sum of its proper divisors (1).

401440007 is an equidigital number, since it uses as much as digits as its factorization.

401440007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 401440007 is about 20035.9678328750. The cubic root of 401440007 is about 737.6894126914.

The spelling of 401440007 in words is "four hundred one million, four hundred forty thousand, seven".