193739489 has 2 divisors, whose sum is σ = 193739490. Its totient is φ = 193739488.

The previous prime is 193739431. The next prime is 193739503. The reversal of 193739489 is 984937391.

It is a happy number.

193739489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184497889 + 9241600 = 13583^2 + 3040^2 .

It is an emirp because it is prime and its reverse (984937391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 193739489 - 2¹² = 193735393 is a prime.

It is a super-2 number, since 2×193739489² = 75069979195962242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 193739489.

It is not a weakly prime, because it can be changed into another prime (193730489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96869744 + 96869745.

It is an arithmetic number, because the mean of its divisors is an integer number (96869745).

Almost surely, 2^193739489 is an apocalyptic number.

It is an amenable number.

193739489 is a deficient number, since it is larger than the sum of its proper divisors (1).

193739489 is an equidigital number, since it uses as much as digits as its factorization.

193739489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 53.

The square root of 193739489 is about 13919.0333356882. The cubic root of 193739489 is about 578.6367995087.

The spelling of 193739489 in words is "one hundred ninety-three million, seven hundred thirty-nine thousand, four hundred eighty-nine".