193320887 has 2 divisors, whose sum is σ = 193320888. Its totient is φ = 193320886.

The previous prime is 193320857. The next prime is 193320913. The reversal of 193320887 is 788023391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 193320887 - 2¹⁸ = 193058743 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (193320817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96660443 + 96660444.

It is an arithmetic number, because the mean of its divisors is an integer number (96660444).

Almost surely, 2^193320887 is an apocalyptic number.

193320887 is a deficient number, since it is larger than the sum of its proper divisors (1).

193320887 is an equidigital number, since it uses as much as digits as its factorization.

193320887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 193320887 is about 13903.9881688672. The cubic root of 193320887 is about 578.2197563583.

The spelling of 193320887 in words is "one hundred ninety-three million, three hundred twenty thousand, eight hundred eighty-seven".