103672721 has 8 divisors (see below), whose sum is σ = 109348320. Its totient is φ = 98019072.

The previous prime is 103672691. The next prime is 103672747. The reversal of 103672721 is 127276301.

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

It is a cyclic number.

It is not a de Polignac number, because 103672721 - 2¹⁴ = 103656337 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (103672781) 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, 4721 + ... + 15153.

It is an arithmetic number, because the mean of its divisors is an integer number (13668540).

Almost surely, 2^103672721 is an apocalyptic number.

It is an amenable number.

103672721 is a deficient number, since it is larger than the sum of its proper divisors (5675599).

103672721 is a wasteful number, since it uses less digits than its factorization.

103672721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10975.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 103672721 is about 10181.9802101556. The cubic root of 103672721 is about 469.7731227318.

The spelling of 103672721 in words is "one hundred three million, six hundred seventy-two thousand, seven hundred twenty-one".