213923889 has 16 divisors (see below), whose sum is σ = 322122240. Its totient is φ = 140276880.

The previous prime is 213923867. The next prime is 213923909. The reversal of 213923889 is 988329312.

It is not a de Polignac number, because 213923889 - 2¹² = 213919793 is a prime.

It is a super-3 number, since 3×213923889³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (213923819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63297 + ... + 66590.

It is an arithmetic number, because the mean of its divisors is an integer number (20132640).

Almost surely, 2^213923889 is an apocalyptic number.

It is an amenable number.

213923889 is a deficient number, since it is larger than the sum of its proper divisors (108198351).

213923889 is a wasteful number, since it uses less digits than its factorization.

213923889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129957 (or 129951 counting only the distinct ones).

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

The square root of 213923889 is about 14626.1371865575. The cubic root of 213923889 is about 598.0714830116.

It can be divided in two parts, 21392 and 3889, that added together give a square (25281 = 159²).

The spelling of 213923889 in words is "two hundred thirteen million, nine hundred twenty-three thousand, eight hundred eighty-nine".