103599399 has 4 divisors (see below), whose sum is σ = 138132536. Its totient is φ = 69066264.

The previous prime is 103599373. The next prime is 103599403. The reversal of 103599399 is 993995301.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 103599399 - 2¹⁶ = 103533863 is a prime.

It is a super-3 number, since 3×103599399³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103597399) 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, 17266564 + ... + 17266569.

It is an arithmetic number, because the mean of its divisors is an integer number (34533134).

Almost surely, 2^103599399 is an apocalyptic number.

103599399 is a deficient number, since it is larger than the sum of its proper divisors (34533137).

103599399 is an equidigital number, since it uses as much as digits as its factorization.

103599399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34533136.

The product of its (nonzero) digits is 295245, while the sum is 48.

The square root of 103599399 is about 10178.3789966772. The cubic root of 103599399 is about 469.6623484025.

The spelling of 103599399 in words is "one hundred three million, five hundred ninety-nine thousand, three hundred ninety-nine".