212799897 has 24 divisors (see below), whose sum is σ = 326017224. Its totient is φ = 133292544.

The previous prime is 212799889. The next prime is 212799901. The reversal of 212799897 is 798997212.

212799897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 50466816 + 162333081 = 7104^2 + 12741^2 .

It is not a de Polignac number, because 212799897 - 2³ = 212799889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212799817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 154303 + ... + 155675.

It is an arithmetic number, because the mean of its divisors is an integer number (13584051).

Almost surely, 2^212799897 is an apocalyptic number.

It is an amenable number.

212799897 is a deficient number, since it is larger than the sum of its proper divisors (113217327).

212799897 is a wasteful number, since it uses less digits than its factorization.

212799897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409 (or 2406 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 212799897 is about 14587.6624926682. The cubic root of 212799897 is about 597.0221871673.

The spelling of 212799897 in words is "two hundred twelve million, seven hundred ninety-nine thousand, eight hundred ninety-seven".