235668921 has 4 divisors (see below), whose sum is σ = 314225232. Its totient is φ = 157112612.

The previous prime is 235668911. The next prime is 235668941. The reversal of 235668921 is 129866532.

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 235668921 - 2⁵ = 235668889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (235668911) 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, 39278151 + ... + 39278156.

It is an arithmetic number, because the mean of its divisors is an integer number (78556308).

Almost surely, 2^235668921 is an apocalyptic number.

It is an amenable number.

235668921 is a deficient number, since it is larger than the sum of its proper divisors (78556311).

235668921 is an equidigital number, since it uses as much as digits as its factorization.

235668921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78556310.

The product of its digits is 155520, while the sum is 42.

The square root of 235668921 is about 15351.5120102223. The cubic root of 235668921 is about 617.6855445092.

The spelling of 235668921 in words is "two hundred thirty-five million, six hundred sixty-eight thousand, nine hundred twenty-one".