193157993 has 8 divisors (see below), whose sum is σ = 227873280. Its totient is φ = 160223040.

The previous prime is 193157989. The next prime is 193157999. The reversal of 193157993 is 399751391.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 193157993 - 2² = 193157989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (193157999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 444848 + ... + 445281.

It is an arithmetic number, because the mean of its divisors is an integer number (28484160).

Almost surely, 2^193157993 is an apocalyptic number.

It is an amenable number.

193157993 is a deficient number, since it is larger than the sum of its proper divisors (34715287).

193157993 is an equidigital number, since it uses as much as digits as its factorization.

193157993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890167.

The product of its digits is 229635, while the sum is 47.

The square root of 193157993 is about 13898.1291186980. The cubic root of 193157993 is about 578.0573062517.

The spelling of 193157993 in words is "one hundred ninety-three million, one hundred fifty-seven thousand, nine hundred ninety-three".