103868721 has 24 divisors (see below), whose sum is σ = 164941920. Its totient is φ = 62462400.

The previous prime is 103868663. The next prime is 103868729. The reversal of 103868721 is 127868301.

It is not a de Polignac number, because 103868721 - 2⁷ = 103868593 is a prime.

It is a super-2 number, since 2×103868721² = 21577422404351682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (103868729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8965 + ... + 16973.

It is an arithmetic number, because the mean of its divisors is an integer number (6872580).

Almost surely, 2^103868721 is an apocalyptic number.

103868721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103868721 is a deficient number, since it is larger than the sum of its proper divisors (61073199).

103868721 is a wasteful number, since it uses less digits than its factorization.

103868721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8157 (or 8154 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 103868721 is about 10191.6005121865. The cubic root of 103868721 is about 470.0689818775.

The spelling of 103868721 in words is "one hundred three million, eight hundred sixty-eight thousand, seven hundred twenty-one".