401097889 has 2 divisors, whose sum is σ = 401097890. Its totient is φ = 401097888.

The previous prime is 401097857. The next prime is 401097901. The reversal of 401097889 is 988790104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340771600 + 60326289 = 18460^2 + 7767^2 .

It is a cyclic number.

It is not a de Polignac number, because 401097889 - 2⁵ = 401097857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401097689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200548944 + 200548945.

It is an arithmetic number, because the mean of its divisors is an integer number (200548945).

Almost surely, 2^401097889 is an apocalyptic number.

It is an amenable number.

401097889 is a deficient number, since it is larger than the sum of its proper divisors (1).

401097889 is an equidigital number, since it uses as much as digits as its factorization.

401097889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 401097889 is about 20027.4284170485. The cubic root of 401097889 is about 737.4797935285.

The spelling of 401097889 in words is "four hundred one million, ninety-seven thousand, eight hundred eighty-nine".