103391999 has 4 divisors (see below), whose sum is σ = 103662336. Its totient is φ = 103121664.

The previous prime is 103391993. The next prime is 103392001. The reversal of 103391999 is 999193301.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103391999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103391993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134594 + ... + 135359.

It is an arithmetic number, because the mean of its divisors is an integer number (25915584).

Almost surely, 2^103391999 is an apocalyptic number.

103391999 is a deficient number, since it is larger than the sum of its proper divisors (270337).

103391999 is an equidigital number, since it uses as much as digits as its factorization.

103391999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270336.

The product of its (nonzero) digits is 59049, while the sum is 44.

The square root of 103391999 is about 10168.1856296982. The cubic root of 103391999 is about 469.3487267468.

The spelling of 103391999 in words is "one hundred three million, three hundred ninety-one thousand, nine hundred ninety-nine".