897790133 has 2 divisors, whose sum is σ = 897790134. Its totient is φ = 897790132.

The previous prime is 897790129. The next prime is 897790139. The reversal of 897790133 is 331097798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877522129 + 20268004 = 29623^2 + 4502^2 .

It is a cyclic number.

It is not a de Polignac number, because 897790133 - 2² = 897790129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (897790139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448895066 + 448895067.

It is an arithmetic number, because the mean of its divisors is an integer number (448895067).

Almost surely, 2^897790133 is an apocalyptic number.

It is an amenable number.

897790133 is a deficient number, since it is larger than the sum of its proper divisors (1).

897790133 is an equidigital number, since it uses as much as digits as its factorization.

897790133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 897790133 is about 29963.1462466811. The cubic root of 897790133 is about 964.6985135669.

The spelling of 897790133 in words is "eight hundred ninety-seven million, seven hundred ninety thousand, one hundred thirty-three".