103699921 has 6 divisors (see below), whose sum is σ = 112290630. Its totient is φ = 95722848.

The previous prime is 103699889. The next prime is 103699943. The reversal of 103699921 is 129996301.

It can be written as a sum of positive squares in 3 ways, for example, as 8910225 + 94789696 = 2985^2 + 9736^2 .

It is not a de Polignac number, because 103699921 - 2⁵ = 103699889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103699021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 306636 + ... + 306973.

It is an arithmetic number, because the mean of its divisors is an integer number (18715105).

Almost surely, 2^103699921 is an apocalyptic number.

It is an amenable number.

103699921 is a deficient number, since it is larger than the sum of its proper divisors (8590709).

103699921 is an equidigital number, since it uses as much as digits as its factorization.

103699921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613635 (or 613622 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 103699921 is about 10183.3158155878. The cubic root of 103699921 is about 469.8142030066.

The spelling of 103699921 in words is "one hundred three million, six hundred ninety-nine thousand, nine hundred twenty-one".