228926993 has 2 divisors, whose sum is σ = 228926994. Its totient is φ = 228926992.

The previous prime is 228926983. The next prime is 228927001. The reversal of 228926993 is 399629822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187607809 + 41319184 = 13697^2 + 6428^2 .

It is a cyclic number.

It is not a de Polignac number, because 228926993 - 2⁴ = 228926977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (228926963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114463496 + 114463497.

It is an arithmetic number, because the mean of its divisors is an integer number (114463497).

Almost surely, 2^228926993 is an apocalyptic number.

It is an amenable number.

228926993 is a deficient number, since it is larger than the sum of its proper divisors (1).

228926993 is an equidigital number, since it uses as much as digits as its factorization.

228926993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 228926993 is about 15130.3335389541. Note that the first 3 decimals coincide. The cubic root of 228926993 is about 611.7382944511.

The spelling of 228926993 in words is "two hundred twenty-eight million, nine hundred twenty-six thousand, nine hundred ninety-three".