897890401 has 2 divisors, whose sum is σ = 897890402. Its totient is φ = 897890400.

The previous prime is 897890369. The next prime is 897890407. The reversal of 897890401 is 104098798.

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., 775566801 + 122323600 = 27849^2 + 11060^2 .

It is a cyclic number.

It is not a de Polignac number, because 897890401 - 2⁵ = 897890369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (897890407) 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, 448945200 + 448945201.

It is an arithmetic number, because the mean of its divisors is an integer number (448945201).

Almost surely, 2^897890401 is an apocalyptic number.

It is an amenable number.

897890401 is a deficient number, since it is larger than the sum of its proper divisors (1).

897890401 is an equidigital number, since it uses as much as digits as its factorization.

897890401 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 897890401 is about 29964.8193887432. The cubic root of 897890401 is about 964.7344257422.

The spelling of 897890401 in words is "eight hundred ninety-seven million, eight hundred ninety thousand, four hundred one".