213898923 has 12 divisors (see below), whose sum is σ = 353103088. Its totient is φ = 122227920.

The previous prime is 213898921. The next prime is 213898963. The reversal of 213898923 is 329898312.

It is not a de Polignac number, because 213898923 - 2¹ = 213898921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213898921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1697548 + ... + 1697673.

Almost surely, 2^213898923 is an apocalyptic number.

213898923 is a deficient number, since it is larger than the sum of its proper divisors (139204165).

213898923 is a wasteful number, since it uses less digits than its factorization.

213898923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395234 (or 3395231 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 213898923 is about 14625.2836895562. The cubic root of 213898923 is about 598.0482161173.

The spelling of 213898923 in words is "two hundred thirteen million, eight hundred ninety-eight thousand, nine hundred twenty-three".