229633891 has 2 divisors, whose sum is σ = 229633892. Its totient is φ = 229633890.

The previous prime is 229633879. The next prime is 229633939. The reversal of 229633891 is 198336922.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229633891 is a prime.

It is not a weakly prime, because it can be changed into another prime (229633801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114816945 + 114816946.

It is an arithmetic number, because the mean of its divisors is an integer number (114816946).

Almost surely, 2^229633891 is an apocalyptic number.

229633891 is a deficient number, since it is larger than the sum of its proper divisors (1).

229633891 is an equidigital number, since it uses as much as digits as its factorization.

229633891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 229633891 is about 15153.6758246968. The cubic root of 229633891 is about 612.3673046431.

The spelling of 229633891 in words is "two hundred twenty-nine million, six hundred thirty-three thousand, eight hundred ninety-one".