220923797987 has 2 divisors, whose sum is σ = 220923797988. Its totient is φ = 220923797986.

The previous prime is 220923797977. The next prime is 220923798013. The reversal of 220923797987 is 789797329022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 220923797987 - 2⁶ = 220923797923 is a prime.

It is not a weakly prime, because it can be changed into another prime (220923797977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110461898993 + 110461898994.

It is an arithmetic number, because the mean of its divisors is an integer number (110461898994).

Almost surely, 2^220923797987 is an apocalyptic number.

220923797987 is a deficient number, since it is larger than the sum of its proper divisors (1).

220923797987 is an equidigital number, since it uses as much as digits as its factorization.

220923797987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48009024, while the sum is 65.

The spelling of 220923797987 in words is "two hundred twenty billion, nine hundred twenty-three million, seven hundred ninety-seven thousand, nine hundred eighty-seven".