897469777 has 2 divisors, whose sum is σ = 897469778. Its totient is φ = 897469776.

The previous prime is 897469753. The next prime is 897469847. The reversal of 897469777 is 777964798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859721041 + 37748736 = 29321^2 + 6144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897469777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (897469717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 448734888 + 448734889.

It is an arithmetic number, because the mean of its divisors is an integer number (448734889).

Almost surely, 2^897469777 is an apocalyptic number.

It is an amenable number.

897469777 is a deficient number, since it is larger than the sum of its proper divisors (1).

897469777 is an equidigital number, since it uses as much as digits as its factorization.

897469777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37340352, while the sum is 64.

The square root of 897469777 is about 29957.7999359098. The cubic root of 897469777 is about 964.5837563381.

The spelling of 897469777 in words is "eight hundred ninety-seven million, four hundred sixty-nine thousand, seven hundred seventy-seven".