1916986573 has 2 divisors, whose sum is σ = 1916986574. Its totient is φ = 1916986572.

The previous prime is 1916986567. The next prime is 1916986667. The reversal of 1916986573 is 3756896191.

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., 1155116169 + 761870404 = 33987^2 + 27602^2 .

It is a cyclic number.

It is not a de Polignac number, because 1916986573 - 2²⁵ = 1883432141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1916986553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958493286 + 958493287.

It is an arithmetic number, because the mean of its divisors is an integer number (958493287).

Almost surely, 2^1916986573 is an apocalyptic number.

It is an amenable number.

1916986573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916986573 is an equidigital number, since it uses as much as digits as its factorization.

1916986573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2449440, while the sum is 55.

The square root of 1916986573 is about 43783.4052238973. The cubic root of 1916986573 is about 1242.2424245196.

The spelling of 1916986573 in words is "one billion, nine hundred sixteen million, nine hundred eighty-six thousand, five hundred seventy-three".