16220977 has 2 divisors, whose sum is σ = 16220978. Its totient is φ = 16220976.

The previous prime is 16220951. The next prime is 16221017. The reversal of 16220977 is 77902261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14258176 + 1962801 = 3776^2 + 1401^2 .

It is a cyclic number.

It is not a de Polignac number, because 16220977 - 2¹¹ = 16218929 is a prime.

It is not a weakly prime, because it can be changed into another prime (16220917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110488 + 8110489.

It is an arithmetic number, because the mean of its divisors is an integer number (8110489).

Almost surely, 2^16220977 is an apocalyptic number.

It is an amenable number.

16220977 is a deficient number, since it is larger than the sum of its proper divisors (1).

16220977 is an equidigital number, since it uses as much as digits as its factorization.

16220977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 16220977 is about 4027.5274052451. The cubic root of 16220977 is about 253.1389666022.

The spelling of 16220977 in words is "sixteen million, two hundred twenty thousand, nine hundred seventy-seven".