193868657 has 2 divisors, whose sum is σ = 193868658. Its totient is φ = 193868656.

The previous prime is 193868621. The next prime is 193868671. The reversal of 193868657 is 756868391.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171505216 + 22363441 = 13096^2 + 4729^2 .

It is a cyclic number.

It is not a de Polignac number, because 193868657 - 2⁶ = 193868593 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 193868599 and 193868608.

It is not a weakly prime, because it can be changed into another prime (193868677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96934328 + 96934329.

It is an arithmetic number, because the mean of its divisors is an integer number (96934329).

Almost surely, 2^193868657 is an apocalyptic number.

It is an amenable number.

193868657 is a deficient number, since it is larger than the sum of its proper divisors (1).

193868657 is an equidigital number, since it uses as much as digits as its factorization.

193868657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 193868657 is about 13923.6725399587. The cubic root of 193868657 is about 578.7653652000.

The spelling of 193868657 in words is "one hundred ninety-three million, eight hundred sixty-eight thousand, six hundred fifty-seven".