229556989 has 2 divisors, whose sum is σ = 229556990. Its totient is φ = 229556988.

The previous prime is 229556963. The next prime is 229557007. The reversal of 229556989 is 989655922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220284964 + 9272025 = 14842^2 + 3045^2 .

It is a cyclic number.

It is not a de Polignac number, because 229556989 - 2¹³ = 229548797 is a prime.

It is a super-2 number, since 2×229556989² = 105392822397492242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229554989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114778494 + 114778495.

It is an arithmetic number, because the mean of its divisors is an integer number (114778495).

Almost surely, 2^229556989 is an apocalyptic number.

It is an amenable number.

229556989 is a deficient number, since it is larger than the sum of its proper divisors (1).

229556989 is an equidigital number, since it uses as much as digits as its factorization.

229556989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 55.

The square root of 229556989 is about 15151.1382080687. The cubic root of 229556989 is about 612.2989385319.

The spelling of 229556989 in words is "two hundred twenty-nine million, five hundred fifty-six thousand, nine hundred eighty-nine".