16977984493 has 2 divisors, whose sum is σ = 16977984494. Its totient is φ = 16977984492.

The previous prime is 16977984469. The next prime is 16977984523. The reversal of 16977984493 is 39448977961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14113915204 + 2864069289 = 118802^2 + 53517^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16977984493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16977924493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8488992246 + 8488992247.

It is an arithmetic number, because the mean of its divisors is an integer number (8488992247).

Almost surely, 2^16977984493 is an apocalyptic number.

It is an amenable number.

16977984493 is a deficient number, since it is larger than the sum of its proper divisors (1).

16977984493 is an equidigital number, since it uses as much as digits as its factorization.

16977984493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82301184, while the sum is 67.

The spelling of 16977984493 in words is "sixteen billion, nine hundred seventy-seven million, nine hundred eighty-four thousand, four hundred ninety-three".