220923797977 has 2 divisors, whose sum is σ = 220923797978. Its totient is φ = 220923797976.

The previous prime is 220923797923. The next prime is 220923797987. The reversal of 220923797977 is 779797329022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220576758336 + 347039641 = 469656^2 + 18629^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220923797977 is a prime.

It is not a weakly prime, because it can be changed into another prime (220923797987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110461898988 + 110461898989.

It is an arithmetic number, because the mean of its divisors is an integer number (110461898989).

Almost surely, 2^220923797977 is an apocalyptic number.

It is an amenable number.

220923797977 is a deficient number, since it is larger than the sum of its proper divisors (1).

220923797977 is an equidigital number, since it uses as much as digits as its factorization.

220923797977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42007896, while the sum is 64.

The spelling of 220923797977 in words is "two hundred twenty billion, nine hundred twenty-three million, seven hundred ninety-seven thousand, nine hundred seventy-seven".