220439897 has 2 divisors, whose sum is σ = 220439898. Its totient is φ = 220439896.

The previous prime is 220439861. The next prime is 220439911. The reversal of 220439897 is 798934022.

220439897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184307776 + 36132121 = 13576^2 + 6011^2 .

It is a cyclic number.

It is not a de Polignac number, because 220439897 - 2¹⁸ = 220177753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220439837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110219948 + 110219949.

It is an arithmetic number, because the mean of its divisors is an integer number (110219949).

Almost surely, 2^220439897 is an apocalyptic number.

It is an amenable number.

220439897 is a deficient number, since it is larger than the sum of its proper divisors (1).

220439897 is an equidigital number, since it uses as much as digits as its factorization.

220439897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 220439897 is about 14847.2184937112. The cubic root of 220439897 is about 604.0831656385.

The spelling of 220439897 in words is "two hundred twenty million, four hundred thirty-nine thousand, eight hundred ninety-seven".