897319261 has 2 divisors, whose sum is σ = 897319262. Its totient is φ = 897319260.

The previous prime is 897319243. The next prime is 897319331. The reversal of 897319261 is 162913798.

It is a happy number.

897319261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 776736900 + 120582361 = 27870^2 + 10981^2 .

It is a cyclic number.

It is not a de Polignac number, because 897319261 - 2⁷ = 897319133 is a prime.

It is a super-2 number, since 2×897319261² = 1610363712323172242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897319201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448659630 + 448659631.

It is an arithmetic number, because the mean of its divisors is an integer number (448659631).

Almost surely, 2^897319261 is an apocalyptic number.

It is an amenable number.

897319261 is a deficient number, since it is larger than the sum of its proper divisors (1).

897319261 is an equidigital number, since it uses as much as digits as its factorization.

897319261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 46.

The square root of 897319261 is about 29955.2876968324. The cubic root of 897319261 is about 964.5298293946.

The spelling of 897319261 in words is "eight hundred ninety-seven million, three hundred nineteen thousand, two hundred sixty-one".