220669973 has 2 divisors, whose sum is σ = 220669974. Its totient is φ = 220669972.

The previous prime is 220669957. The next prime is 220669991. The reversal of 220669973 is 379966022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134977924 + 85692049 = 11618^2 + 9257^2 .

It is a cyclic number.

It is not a de Polignac number, because 220669973 - 2⁴ = 220669957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220663973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110334986 + 110334987.

It is an arithmetic number, because the mean of its divisors is an integer number (110334987).

Almost surely, 2^220669973 is an apocalyptic number.

It is an amenable number.

220669973 is a deficient number, since it is larger than the sum of its proper divisors (1).

220669973 is an equidigital number, since it uses as much as digits as its factorization.

220669973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 220669973 is about 14854.9645910046. The cubic root of 220669973 is about 604.2932557278.

The spelling of 220669973 in words is "two hundred twenty million, six hundred sixty-nine thousand, nine hundred seventy-three".