103928391 has 12 divisors (see below), whose sum is σ = 171564432. Its totient is φ = 59387616.

The previous prime is 103928387. The next prime is 103928393. The reversal of 103928391 is 193829301.

It is not a de Polignac number, because 103928391 - 2² = 103928387 is a prime.

It is a super-2 number, since 2×103928391² = 21602220911697762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103928393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 824766 + ... + 824891.

It is an arithmetic number, because the mean of its divisors is an integer number (14297036).

Almost surely, 2^103928391 is an apocalyptic number.

103928391 is a deficient number, since it is larger than the sum of its proper divisors (67636041).

103928391 is a wasteful number, since it uses less digits than its factorization.

103928391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649670 (or 1649667 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 103928391 is about 10194.5275025378. The cubic root of 103928391 is about 470.1589789636.

The spelling of 103928391 in words is "one hundred three million, nine hundred twenty-eight thousand, three hundred ninety-one".