103191993 has 12 divisors (see below), whose sum is σ = 151280688. Its totient is φ = 67767480.

The previous prime is 103191973. The next prime is 103192009. The reversal of 103191993 is 399191301.

It is not a de Polignac number, because 103191993 - 2⁶ = 103191929 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (103191923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84963 + ... + 86168.

It is an arithmetic number, because the mean of its divisors is an integer number (12606724).

Almost surely, 2^103191993 is an apocalyptic number.

It is an amenable number.

103191993 is a deficient number, since it is larger than the sum of its proper divisors (48088695).

103191993 is a wasteful number, since it uses less digits than its factorization.

103191993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171204 (or 171201 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 36.

The square root of 103191993 is about 10158.3459775694. The cubic root of 103191993 is about 469.0458884940.

The spelling of 103191993 in words is "one hundred three million, one hundred ninety-one thousand, nine hundred ninety-three".