229378861 has 2 divisors, whose sum is σ = 229378862. Its totient is φ = 229378860.

The previous prime is 229378829. The next prime is 229378867. The reversal of 229378861 is 168873922.

229378861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 227828836 + 1550025 = 15094^2 + 1245^2 .

It is a cyclic number.

It is not a de Polignac number, because 229378861 - 2⁵ = 229378829 is a prime.

It is a super-2 number, since 2×229378861² = 105229323747314642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229378867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114689430 + 114689431.

It is an arithmetic number, because the mean of its divisors is an integer number (114689431).

Almost surely, 2^229378861 is an apocalyptic number.

It is an amenable number.

229378861 is a deficient number, since it is larger than the sum of its proper divisors (1).

229378861 is an equidigital number, since it uses as much as digits as its factorization.

229378861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 229378861 is about 15145.2586970312. The cubic root of 229378861 is about 612.1405235362.

The spelling of 229378861 in words is "two hundred twenty-nine million, three hundred seventy-eight thousand, eight hundred sixty-one".