229911973 has 2 divisors, whose sum is σ = 229911974. Its totient is φ = 229911972.

The previous prime is 229911931. The next prime is 229912003. The reversal of 229911973 is 379119922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145878084 + 84033889 = 12078^2 + 9167^2 .

It is a cyclic number.

It is not a de Polignac number, because 229911973 - 2²⁵ = 196357541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229911923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114955986 + 114955987.

It is an arithmetic number, because the mean of its divisors is an integer number (114955987).

Almost surely, 2^229911973 is an apocalyptic number.

It is an amenable number.

229911973 is a deficient number, since it is larger than the sum of its proper divisors (1).

229911973 is an equidigital number, since it uses as much as digits as its factorization.

229911973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 43.

The square root of 229911973 is about 15162.8484461199. The cubic root of 229911973 is about 612.6143930726.

It can be divided in two parts, 22991 and 1973, that added together give a square (24964 = 158²).

The spelling of 229911973 in words is "two hundred twenty-nine million, nine hundred eleven thousand, nine hundred seventy-three".