103921665 has 8 divisors (see below), whose sum is σ = 166274688. Its totient is φ = 55424880.

The previous prime is 103921639. The next prime is 103921667. The reversal of 103921665 is 566129301.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 103921665 - 2⁵ = 103921633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (103921667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3464041 + ... + 3464070.

It is an arithmetic number, because the mean of its divisors is an integer number (20784336).

Almost surely, 2^103921665 is an apocalyptic number.

103921665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103921665 is a deficient number, since it is larger than the sum of its proper divisors (62353023).

103921665 is an equidigital number, since it uses as much as digits as its factorization.

103921665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6928119.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 103921665 is about 10194.1976143294. The cubic root of 103921665 is about 470.1488362186.

The spelling of 103921665 in words is "one hundred three million, nine hundred twenty-one thousand, six hundred sixty-five".