192988813 has 2 divisors, whose sum is σ = 192988814. Its totient is φ = 192988812.

The previous prime is 192988793. The next prime is 192988843. The reversal of 192988813 is 318889291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161874729 + 31114084 = 12723^2 + 5578^2 .

It is a cyclic number.

It is not a de Polignac number, because 192988813 - 2¹³ = 192980621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (192988843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96494406 + 96494407.

It is an arithmetic number, because the mean of its divisors is an integer number (96494407).

Almost surely, 2^192988813 is an apocalyptic number.

It is an amenable number.

192988813 is a deficient number, since it is larger than the sum of its proper divisors (1).

192988813 is an equidigital number, since it uses as much as digits as its factorization.

192988813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 49.

The square root of 192988813 is about 13892.0413546750. The cubic root of 192988813 is about 577.8884905595. Note that the first 3 decimals are identical.

The spelling of 192988813 in words is "one hundred ninety-two million, nine hundred eighty-eight thousand, eight hundred thirteen".