229904397 has 6 divisors (see below), whose sum is σ = 332084142. Its totient is φ = 153269592.

The previous prime is 229904387. The next prime is 229904399. The reversal of 229904397 is 793409922.

It can be written as a sum of positive squares in only one way, i.e., 158231241 + 71673156 = 12579^2 + 8466^2 .

It is not a de Polignac number, because 229904397 - 2¹⁸ = 229642253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229904399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12772458 + ... + 12772475.

It is an arithmetic number, because the mean of its divisors is an integer number (55347357).

Almost surely, 2^229904397 is an apocalyptic number.

It is an amenable number.

229904397 is a deficient number, since it is larger than the sum of its proper divisors (102179745).

229904397 is a wasteful number, since it uses less digits than its factorization.

229904397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25544939 (or 25544936 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 229904397 is about 15162.5986229274. The cubic root of 229904397 is about 612.6076640949.

The spelling of 229904397 in words is "two hundred twenty-nine million, nine hundred four thousand, three hundred ninety-seven".