103826721 has 4 divisors (see below), whose sum is σ = 138435632. Its totient is φ = 69217812.

The previous prime is 103826717. The next prime is 103826729. The reversal of 103826721 is 127628301.

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 not a de Polignac number, because 103826721 - 2² = 103826717 is a prime.

It is a super-2 number, since 2×103826721² = 21559975987223682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (103826729) 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, 17304451 + ... + 17304456.

It is an arithmetic number, because the mean of its divisors is an integer number (34608908).

Almost surely, 2^103826721 is an apocalyptic number.

It is an amenable number.

103826721 is a deficient number, since it is larger than the sum of its proper divisors (34608911).

103826721 is an equidigital number, since it uses as much as digits as its factorization.

103826721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34608910.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 103826721 is about 10189.5397835231. The cubic root of 103826721 is about 470.0056148416.

The spelling of 103826721 in words is "one hundred three million, eight hundred twenty-six thousand, seven hundred twenty-one".