220657939 has 2 divisors, whose sum is σ = 220657940. Its totient is φ = 220657938.

The previous prime is 220657937. The next prime is 220657951. The reversal of 220657939 is 939756022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220657939 - 2¹ = 220657937 is a prime.

Together with 220657937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 220657895 and 220657904.

It is not a weakly prime, because it can be changed into another prime (220657933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110328969 + 110328970.

It is an arithmetic number, because the mean of its divisors is an integer number (110328970).

Almost surely, 2^220657939 is an apocalyptic number.

220657939 is a deficient number, since it is larger than the sum of its proper divisors (1).

220657939 is an equidigital number, since it uses as much as digits as its factorization.

220657939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 220657939 is about 14854.5595357116. The cubic root of 220657939 is about 604.2822707002.

The spelling of 220657939 in words is "two hundred twenty million, six hundred fifty-seven thousand, nine hundred thirty-nine".