401006653 has 2 divisors, whose sum is σ = 401006654. Its totient is φ = 401006652.

The previous prime is 401006597. The next prime is 401006681. The reversal of 401006653 is 356600104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 331167204 + 69839449 = 18198^2 + 8357^2 .

It is a cyclic number.

It is not a de Polignac number, because 401006653 - 2⁹ = 401006141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401016653) 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, 200503326 + 200503327.

It is an arithmetic number, because the mean of its divisors is an integer number (200503327).

Almost surely, 2^401006653 is an apocalyptic number.

It is an amenable number.

401006653 is a deficient number, since it is larger than the sum of its proper divisors (1).

401006653 is an equidigital number, since it uses as much as digits as its factorization.

401006653 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 401006653 is about 20025.1505112945. The cubic root of 401006653 is about 737.4238721765.

Adding to 401006653 its reverse (356600104), we get a palindrome (757606757).

The spelling of 401006653 in words is "four hundred one million, six thousand, six hundred fifty-three".