220669957 has 2 divisors, whose sum is σ = 220669958. Its totient is φ = 220669956.

The previous prime is 220669949. The next prime is 220669973. The reversal of 220669957 is 759966022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217680516 + 2989441 = 14754^2 + 1729^2 .

It is a cyclic number.

It is not a de Polignac number, because 220669957 - 2³ = 220669949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220669907) 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 as a sum of consecutive naturals, namely, 110334978 + 110334979.

It is an arithmetic number, because the mean of its divisors is an integer number (110334979).

Almost surely, 2^220669957 is an apocalyptic number.

It is an amenable number.

220669957 is a deficient number, since it is larger than the sum of its proper divisors (1).

220669957 is an equidigital number, since it uses as much as digits as its factorization.

220669957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 220669957 is about 14854.9640524641. The cubic root of 220669957 is about 604.2932411227.

It can be divided in two parts, 22066 and 9957, that added together give a palindrome (32023).

The spelling of 220669957 in words is "two hundred twenty million, six hundred sixty-nine thousand, nine hundred fifty-seven".