103287993 has 4 divisors (see below), whose sum is σ = 137717328. Its totient is φ = 68858660.

The previous prime is 103287991. The next prime is 103288019. The reversal of 103287993 is 399782301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 103287993 - 2¹ = 103287991 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (103287991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17214663 + ... + 17214668.

It is an arithmetic number, because the mean of its divisors is an integer number (34429332).

Almost surely, 2^103287993 is an apocalyptic number.

It is an amenable number.

103287993 is a deficient number, since it is larger than the sum of its proper divisors (34429335).

103287993 is an equidigital number, since it uses as much as digits as its factorization.

103287993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34429334.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 103287993 is about 10163.0700578123. The cubic root of 103287993 is about 469.1912952833.

The spelling of 103287993 in words is "one hundred three million, two hundred eighty-seven thousand, nine hundred ninety-three".