888971505173897 has 2 divisors, whose sum is σ = 888971505173898. Its totient is φ = 888971505173896.

The previous prime is 888971505173893. The next prime is 888971505173981. The reversal of 888971505173897 is 798371505179888.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869681981717641 + 19289523456256 = 29490371^2 + 4391984^2 .

It is a cyclic number.

It is not a de Polignac number, because 888971505173897 - 2² = 888971505173893 is a prime.

It is a super-2 number, since 2×888971505173897² (a number of 31 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (888971505173893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444485752586948 + 444485752586949.

It is an arithmetic number, because the mean of its divisors is an integer number (444485752586949).

Almost surely, 2^{888971505173897} is an apocalyptic number.

It is an amenable number.

888971505173897 is a deficient number, since it is larger than the sum of its proper divisors (1).

888971505173897 is an equidigital number, since it uses as much as digits as its factorization.

888971505173897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8534937600, while the sum is 86.

The spelling of 888971505173897 in words is "eight hundred eighty-eight trillion, nine hundred seventy-one billion, five hundred five million, one hundred seventy-three thousand, eight hundred ninety-seven".