220439190997 has 2 divisors, whose sum is σ = 220439190998. Its totient is φ = 220439190996.

The previous prime is 220439190989. The next prime is 220439191003. The reversal of 220439190997 is 799091934022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 175851067716 + 44588123281 = 419346^2 + 211159^2 .

It is a cyclic number.

It is not a de Polignac number, because 220439190997 - 2³ = 220439190989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220439140997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110219595498 + 110219595499.

It is an arithmetic number, because the mean of its divisors is an integer number (110219595499).

Almost surely, 2^220439190997 is an apocalyptic number.

It is an amenable number.

220439190997 is a deficient number, since it is larger than the sum of its proper divisors (1).

220439190997 is an equidigital number, since it uses as much as digits as its factorization.

220439190997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2204496, while the sum is 55.

The spelling of 220439190997 in words is "two hundred twenty billion, four hundred thirty-nine million, one hundred ninety thousand, nine hundred ninety-seven".