220390123 has 2 divisors, whose sum is σ = 220390124. Its totient is φ = 220390122.

The previous prime is 220390109. The next prime is 220390127. The reversal of 220390123 is 321093022.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220390123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220390094 and 220390103.

It is not a weakly prime, because it can be changed into another prime (220390127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110195061 + 110195062.

It is an arithmetic number, because the mean of its divisors is an integer number (110195062).

Almost surely, 2^220390123 is an apocalyptic number.

220390123 is a deficient number, since it is larger than the sum of its proper divisors (1).

220390123 is an equidigital number, since it uses as much as digits as its factorization.

220390123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 220390123 is about 14845.5421928605. The cubic root of 220390123 is about 604.0376961035.

The spelling of 220390123 in words is "two hundred twenty million, three hundred ninety thousand, one hundred twenty-three".