103193991 has 6 divisors (see below), whose sum is σ = 149058000. Its totient is φ = 68795988.

The previous prime is 103193963. The next prime is 103194001. The reversal of 103193991 is 199391301.

It is not a de Polignac number, because 103193991 - 2⁷ = 103193863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103193291) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5732991 + ... + 5733008.

It is an arithmetic number, because the mean of its divisors is an integer number (24843000).

Almost surely, 2^103193991 is an apocalyptic number.

103193991 is a deficient number, since it is larger than the sum of its proper divisors (45864009).

103193991 is a wasteful number, since it uses less digits than its factorization.

103193991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11466005 (or 11466002 counting only the distinct ones).

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

The square root of 103193991 is about 10158.4443198750. Note that the first 3 decimals coincide. The cubic root of 103193991 is about 469.0489156916.

The spelling of 103193991 in words is "one hundred three million, one hundred ninety-three thousand, nine hundred ninety-one".