229409861 has 2 divisors, whose sum is σ = 229409862. Its totient is φ = 229409860.

The previous prime is 229409839. The next prime is 229409881. The reversal of 229409861 is 168904922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171741025 + 57668836 = 13105^2 + 7594^2 .

It is a cyclic number.

It is not a de Polignac number, because 229409861 - 2¹⁴ = 229393477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229409881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114704930 + 114704931.

It is an arithmetic number, because the mean of its divisors is an integer number (114704931).

Almost surely, 2^229409861 is an apocalyptic number.

It is an amenable number.

229409861 is a deficient number, since it is larger than the sum of its proper divisors (1).

229409861 is an equidigital number, since it uses as much as digits as its factorization.

229409861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 229409861 is about 15146.2820850531. The cubic root of 229409861 is about 612.1680987326.

The spelling of 229409861 in words is "two hundred twenty-nine million, four hundred nine thousand, eight hundred sixty-one".