220940977 has 2 divisors, whose sum is σ = 220940978. Its totient is φ = 220940976.

The previous prime is 220940971. The next prime is 220941001. The reversal of 220940977 is 779049022.

220940977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158357056 + 62583921 = 12584^2 + 7911^2 .

It is a cyclic number.

It is not a de Polignac number, because 220940977 - 2⁷ = 220940849 is a prime.

It is a super-3 number, since 3×220940977³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (220940971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110470488 + 110470489.

It is an arithmetic number, because the mean of its divisors is an integer number (110470489).

Almost surely, 2^220940977 is an apocalyptic number.

It is an amenable number.

220940977 is a deficient number, since it is larger than the sum of its proper divisors (1).

220940977 is an equidigital number, since it uses as much as digits as its factorization.

220940977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 220940977 is about 14864.0834564396. The cubic root of 220940977 is about 604.5405313204.

Adding to 220940977 its reverse (779049022), we get a palindrome (999989999).

The spelling of 220940977 in words is "two hundred twenty million, nine hundred forty thousand, nine hundred seventy-seven".