220967977 has 4 divisors (see below), whose sum is σ = 223765120. Its totient is φ = 218170836.

The previous prime is 220967963. The next prime is 220968019. The reversal of 220967977 is 779769022.

220967977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220967977 - 2¹⁹ = 220443689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 220967977.

It is not an unprimeable number, because it can be changed into a prime (220967917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1398453 + ... + 1398610.

It is an arithmetic number, because the mean of its divisors is an integer number (55941280).

Almost surely, 2^220967977 is an apocalyptic number.

It is an amenable number.

220967977 is a deficient number, since it is larger than the sum of its proper divisors (2797143).

220967977 is an equidigital number, since it uses as much as digits as its factorization.

220967977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797142.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 220967977 is about 14864.9916582553. The cubic root of 220967977 is about 604.5651561919.

The spelling of 220967977 in words is "two hundred twenty million, nine hundred sixty-seven thousand, nine hundred seventy-seven".