897169781953 has 4 divisors (see below), whose sum is σ = 897175729620. Its totient is φ = 897163834288.

The previous prime is 897169781939. The next prime is 897169781983. The reversal of 897169781953 is 359187961798.

897169781953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 691064677809 + 206105104144 = 831303^2 + 453988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-897169781953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (897169781983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2741518 + ... + 3051271.

It is an arithmetic number, because the mean of its divisors is an integer number (224293932405).

Almost surely, 2^897169781953 is an apocalyptic number.

It is an amenable number.

897169781953 is a deficient number, since it is larger than the sum of its proper divisors (5947667).

897169781953 is a wasteful number, since it uses less digits than its factorization.

897169781953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5947666.

The product of its digits is 205752960, while the sum is 73.

The spelling of 897169781953 in words is "eight hundred ninety-seven billion, one hundred sixty-nine million, seven hundred eighty-one thousand, nine hundred fifty-three".