233989881 has 4 divisors (see below), whose sum is σ = 311986512. Its totient is φ = 155993252.

The previous prime is 233989871. The next prime is 233989897. The reversal of 233989881 is 188989332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233989881 - 2⁵ = 233989849 is a prime.

It is a super-2 number, since 2×233989881² = 109502528820788322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (233989841) 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, 38998311 + ... + 38998316.

It is an arithmetic number, because the mean of its divisors is an integer number (77996628).

Almost surely, 2^233989881 is an apocalyptic number.

It is an amenable number.

233989881 is a deficient number, since it is larger than the sum of its proper divisors (77996631).

233989881 is an equidigital number, since it uses as much as digits as its factorization.

233989881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77996630.

The product of its digits is 746496, while the sum is 51.

The square root of 233989881 is about 15296.7277873407. The cubic root of 233989881 is about 616.2151320674.

The spelling of 233989881 in words is "two hundred thirty-three million, nine hundred eighty-nine thousand, eight hundred eighty-one".