1972222177 has 2 divisors, whose sum is σ = 1972222178. Its totient is φ = 1972222176.

The previous prime is 1972222163. The next prime is 1972222229. The reversal of 1972222177 is 7712222791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1593686241 + 378535936 = 39921^2 + 19456^2 .

It is a cyclic number.

It is not a de Polignac number, because 1972222177 - 2²³ = 1963833569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1972222277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986111088 + 986111089.

It is an arithmetic number, because the mean of its divisors is an integer number (986111089).

Almost surely, 2^1972222177 is an apocalyptic number.

It is an amenable number.

1972222177 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972222177 is an equidigital number, since it uses as much as digits as its factorization.

1972222177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49392, while the sum is 40.

The square root of 1972222177 is about 44409.7081390995. The cubic root of 1972222177 is about 1254.0608576885.

The spelling of 1972222177 in words is "one billion, nine hundred seventy-two million, two hundred twenty-two thousand, one hundred seventy-seven".