229687421 has 2 divisors, whose sum is σ = 229687422. Its totient is φ = 229687420.

The previous prime is 229687417. The next prime is 229687427. The reversal of 229687421 is 124786922.

229687421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177688900 + 51998521 = 13330^2 + 7211^2 .

It is a cyclic number.

It is not a de Polignac number, because 229687421 - 2² = 229687417 is a prime.

It is a super-2 number, since 2×229687421² = 105512622731262482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229687427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114843710 + 114843711.

It is an arithmetic number, because the mean of its divisors is an integer number (114843711).

Almost surely, 2^229687421 is an apocalyptic number.

It is an amenable number.

229687421 is a deficient number, since it is larger than the sum of its proper divisors (1).

229687421 is an equidigital number, since it uses as much as digits as its factorization.

229687421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 41.

The square root of 229687421 is about 15155.4419599034. The cubic root of 229687421 is about 612.4148839658.

The spelling of 229687421 in words is "two hundred twenty-nine million, six hundred eighty-seven thousand, four hundred twenty-one".