401097857 has 2 divisors, whose sum is σ = 401097858. Its totient is φ = 401097856.

The previous prime is 401097841. The next prime is 401097889. The reversal of 401097857 is 758790104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390102001 + 10995856 = 19751^2 + 3316^2 .

It is a cyclic number.

It is not a de Polignac number, because 401097857 - 2⁴ = 401097841 is a prime.

It is not a weakly prime, because it can be changed into another prime (401097757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200548928 + 200548929.

It is an arithmetic number, because the mean of its divisors is an integer number (200548929).

Almost surely, 2^401097857 is an apocalyptic number.

It is an amenable number.

401097857 is a deficient number, since it is larger than the sum of its proper divisors (1).

401097857 is an equidigital number, since it uses as much as digits as its factorization.

401097857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 401097857 is about 20027.4276181441. The cubic root of 401097857 is about 737.4797739162.

The spelling of 401097857 in words is "four hundred one million, ninety-seven thousand, eight hundred fifty-seven".