193997086 has 4 divisors (see below), whose sum is σ = 290995632. Its totient is φ = 96998542.

The previous prime is 193997071. The next prime is 193997131. The reversal of 193997086 is 680799391.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 680799391 = 17 ⋅40047023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48499270 + ... + 48499273.

It is an arithmetic number, because the mean of its divisors is an integer number (72748908).

Almost surely, 2^193997086 is an apocalyptic number.

193997086 is a deficient number, since it is larger than the sum of its proper divisors (96998546).

193997086 is an equidigital number, since it uses as much as digits as its factorization.

193997086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96998545.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 193997086 is about 13928.2836702876. The cubic root of 193997086 is about 578.8931387329.

The spelling of 193997086 in words is "one hundred ninety-three million, nine hundred ninety-seven thousand, eighty-six".