229492991 has 8 divisors (see below), whose sum is σ = 282453024. Its totient is φ = 181576800.

The previous prime is 229492987. The next prime is 229492993. The reversal of 229492991 is 199294922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 229492991 - 2² = 229492987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229492993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1260860 + ... + 1261041.

It is an arithmetic number, because the mean of its divisors is an integer number (35306628).

Almost surely, 2^229492991 is an apocalyptic number.

229492991 is a deficient number, since it is larger than the sum of its proper divisors (52960033).

229492991 is a wasteful number, since it uses less digits than its factorization.

229492991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521921.

The product of its digits is 209952, while the sum is 47.

The square root of 229492991 is about 15149.0260743059. The cubic root of 229492991 is about 612.2420324746.

The spelling of 229492991 in words is "two hundred twenty-nine million, four hundred ninety-two thousand, nine hundred ninety-one".