103998645 has 24 divisors (see below), whose sum is σ = 186081792. Its totient is φ = 53676000.

The previous prime is 103998637. The next prime is 103998677. The reversal of 103998645 is 546899301.

It is a happy number.

It is not a de Polignac number, because 103998645 - 2³ = 103998637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 103998645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35881 + ... + 38670.

It is an arithmetic number, because the mean of its divisors is an integer number (7753408).

Almost surely, 2^103998645 is an apocalyptic number.

103998645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

103998645 is a deficient number, since it is larger than the sum of its proper divisors (82083147).

103998645 is a wasteful number, since it uses less digits than its factorization.

103998645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74593 (or 74590 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 103998645 is about 10197.9725926284. The cubic root of 103998645 is about 470.2648951901.

It can be divided in two parts, 10399 and 8645, that added together give a square (19044 = 138²).

The spelling of 103998645 in words is "one hundred three million, nine hundred ninety-eight thousand, six hundred forty-five".