193115893 has 2 divisors, whose sum is σ = 193115894. Its totient is φ = 193115892.

The previous prime is 193115831. The next prime is 193115899. The reversal of 193115893 is 398511391.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105637284 + 87478609 = 10278^2 + 9353^2 .

It is a cyclic number.

It is not a de Polignac number, because 193115893 - 2⁹ = 193115381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193115899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96557946 + 96557947.

It is an arithmetic number, because the mean of its divisors is an integer number (96557947).

Almost surely, 2^193115893 is an apocalyptic number.

It is an amenable number.

193115893 is a deficient number, since it is larger than the sum of its proper divisors (1).

193115893 is an equidigital number, since it uses as much as digits as its factorization.

193115893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 40.

The square root of 193115893 is about 13896.6144438133. The cubic root of 193115893 is about 578.0153061244.

The spelling of 193115893 in words is "one hundred ninety-three million, one hundred fifteen thousand, eight hundred ninety-three".