236928089 has 2 divisors, whose sum is σ = 236928090. Its totient is φ = 236928088.

The previous prime is 236928061. The next prime is 236928091. The reversal of 236928089 is 980829632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211848025 + 25080064 = 14555^2 + 5008^2 .

It is a cyclic number.

It is not a de Polignac number, because 236928089 - 2⁸ = 236927833 is a prime.

It is a super-2 number, since 2×236928089² = 112269838714383842, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 236928091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (236928059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 118464044 + 118464045.

It is an arithmetic number, because the mean of its divisors is an integer number (118464045).

Almost surely, 2^236928089 is an apocalyptic number.

It is an amenable number.

236928089 is a deficient number, since it is larger than the sum of its proper divisors (1).

236928089 is an equidigital number, since it uses as much as digits as its factorization.

236928089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 236928089 is about 15392.4685804454. The cubic root of 236928089 is about 618.7836793694.

The spelling of 236928089 in words is "two hundred thirty-six million, nine hundred twenty-eight thousand, eighty-nine".