220309949 has 2 divisors, whose sum is σ = 220309950. Its totient is φ = 220309948.

The previous prime is 220309927. The next prime is 220309993. The reversal of 220309949 is 949903022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151536100 + 68773849 = 12310^2 + 8293^2 .

It is a cyclic number.

It is not a de Polignac number, because 220309949 - 2¹² = 220305853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220309849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110154974 + 110154975.

It is an arithmetic number, because the mean of its divisors is an integer number (110154975).

Almost surely, 2^220309949 is an apocalyptic number.

It is an amenable number.

220309949 is a deficient number, since it is larger than the sum of its proper divisors (1).

220309949 is an equidigital number, since it uses as much as digits as its factorization.

220309949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 220309949 is about 14842.8416753666. The cubic root of 220309949 is about 603.9644411693.

The spelling of 220309949 in words is "two hundred twenty million, three hundred nine thousand, nine hundred forty-nine".