220958977 has 2 divisors, whose sum is σ = 220958978. Its totient is φ = 220958976.

The previous prime is 220958951. The next prime is 220958981. The reversal of 220958977 is 779859022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211527936 + 9431041 = 14544^2 + 3071^2 .

It is a cyclic number.

It is not a de Polignac number, because 220958977 - 2¹⁹ = 220434689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220958977.

It is not a weakly prime, because it can be changed into another prime (220958077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110479488 + 110479489.

It is an arithmetic number, because the mean of its divisors is an integer number (110479489).

Almost surely, 2^220958977 is an apocalyptic number.

It is an amenable number.

220958977 is a deficient number, since it is larger than the sum of its proper divisors (1).

220958977 is an equidigital number, since it uses as much as digits as its factorization.

220958977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 220958977 is about 14864.6889304822. The cubic root of 220958977 is about 604.5569481243.

The spelling of 220958977 in words is "two hundred twenty million, nine hundred fifty-eight thousand, nine hundred seventy-seven".