1868773477 has 2 divisors, whose sum is σ = 1868773478. Its totient is φ = 1868773476.

The previous prime is 1868773451. The next prime is 1868773531. The reversal of 1868773477 is 7743778681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1655350596 + 213422881 = 40686^2 + 14609^2 .

It is a cyclic number.

It is not a de Polignac number, because 1868773477 - 2¹⁹ = 1868249189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1868713477) 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, 934386738 + 934386739.

It is an arithmetic number, because the mean of its divisors is an integer number (934386739).

Almost surely, 2^1868773477 is an apocalyptic number.

It is an amenable number.

1868773477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868773477 is an equidigital number, since it uses as much as digits as its factorization.

1868773477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11063808, while the sum is 58.

The square root of 1868773477 is about 43229.3127056168. The cubic root of 1868773477 is about 1231.7395522157.

The spelling of 1868773477 in words is "one billion, eight hundred sixty-eight million, seven hundred seventy-three thousand, four hundred seventy-seven".