401645017 has 2 divisors, whose sum is σ = 401645018. Its totient is φ = 401645016.

The previous prime is 401645003. The next prime is 401645059. The reversal of 401645017 is 710546104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 370909081 + 30735936 = 19259^2 + 5544^2 .

It is a cyclic number.

It is not a de Polignac number, because 401645017 - 2⁷ = 401644889 is a prime.

It is a super-2 number, since 2×401645017² = 322637439361860578, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401645117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200822508 + 200822509.

It is an arithmetic number, because the mean of its divisors is an integer number (200822509).

Almost surely, 2^401645017 is an apocalyptic number.

It is an amenable number.

401645017 is a deficient number, since it is larger than the sum of its proper divisors (1).

401645017 is an equidigital number, since it uses as much as digits as its factorization.

401645017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 401645017 is about 20041.0832292069. The cubic root of 401645017 is about 737.8149673337.

The spelling of 401645017 in words is "four hundred one million, six hundred forty-five thousand, seventeen".