21234097 has 2 divisors, whose sum is σ = 21234098. Its totient is φ = 21234096.

The previous prime is 21234091. The next prime is 21234113. The reversal of 21234097 is 79043212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21077281 + 156816 = 4591^2 + 396^2 .

It is a cyclic number.

It is not a de Polignac number, because 21234097 - 2¹¹ = 21232049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21234091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617048 + 10617049.

It is an arithmetic number, because the mean of its divisors is an integer number (10617049).

Almost surely, 2^21234097 is an apocalyptic number.

It is an amenable number.

21234097 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234097 is an equidigital number, since it uses as much as digits as its factorization.

21234097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 21234097 is about 4608.0469832674. The cubic root of 21234097 is about 276.9137997624.

The spelling of 21234097 in words is "twenty-one million, two hundred thirty-four thousand, ninety-seven".