228001409 has 2 divisors, whose sum is σ = 228001410. Its totient is φ = 228001408.

The previous prime is 228001381. The next prime is 228001421. The reversal of 228001409 is 904100822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204575809 + 23425600 = 14303^2 + 4840^2 .

It is a cyclic number.

It is not a de Polignac number, because 228001409 - 2⁸ = 228001153 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 (228001489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114000704 + 114000705.

It is an arithmetic number, because the mean of its divisors is an integer number (114000705).

Almost surely, 2^228001409 is an apocalyptic number.

It is an amenable number.

228001409 is a deficient number, since it is larger than the sum of its proper divisors (1).

228001409 is an equidigital number, since it uses as much as digits as its factorization.

228001409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 228001409 is about 15099.7155271217. The cubic root of 228001409 is about 610.9127328683.

The spelling of 228001409 in words is "two hundred twenty-eight million, one thousand, four hundred nine".