193972609 has 2 divisors, whose sum is σ = 193972610. Its totient is φ = 193972608.

The previous prime is 193972573. The next prime is 193972627. The reversal of 193972609 is 906279391.

193972609 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., 186923584 + 7049025 = 13672^2 + 2655^2 .

It is a cyclic number.

It is not a de Polignac number, because 193972609 - 2¹⁷ = 193841537 is a prime.

It is not a weakly prime, because it can be changed into another prime (193972679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96986304 + 96986305.

It is an arithmetic number, because the mean of its divisors is an integer number (96986305).

Almost surely, 2^193972609 is an apocalyptic number.

It is an amenable number.

193972609 is a deficient number, since it is larger than the sum of its proper divisors (1).

193972609 is an equidigital number, since it uses as much as digits as its factorization.

193972609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 193972609 is about 13927.4049628780. The cubic root of 193972609 is about 578.8687910075.

The spelling of 193972609 in words is "one hundred ninety-three million, nine hundred seventy-two thousand, six hundred nine".