1977164633 has 2 divisors, whose sum is σ = 1977164634. Its totient is φ = 1977164632.

The previous prime is 1977164621. The next prime is 1977164669. The reversal of 1977164633 is 3364617791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1607448649 + 369715984 = 40093^2 + 19228^2 .

It is an emirp because it is prime and its reverse (3364617791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1977164633 - 2⁶ = 1977164569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1977161633) 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, 988582316 + 988582317.

It is an arithmetic number, because the mean of its divisors is an integer number (988582317).

Almost surely, 2^1977164633 is an apocalyptic number.

It is an amenable number.

1977164633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977164633 is an equidigital number, since it uses as much as digits as its factorization.

1977164633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 47.

The square root of 1977164633 is about 44465.3194411105. The cubic root of 1977164633 is about 1255.1075569051.

The spelling of 1977164633 in words is "one billion, nine hundred seventy-seven million, one hundred sixty-four thousand, six hundred thirty-three".