102003644 has 6 divisors (see below), whose sum is σ = 178506384. Its totient is φ = 51001820.

The previous prime is 102003623. The next prime is 102003653. The reversal of 102003644 is 446300201.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12750452 + ... + 12750459.

It is an arithmetic number, because the mean of its divisors is an integer number (29751064).

Almost surely, 2^102003644 is an apocalyptic number.

It is an amenable number.

102003644 is a deficient number, since it is larger than the sum of its proper divisors (76502740).

102003644 is a wasteful number, since it uses less digits than its factorization.

102003644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25500915 (or 25500913 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 102003644 is about 10099.6853416332. The cubic root of 102003644 is about 467.2384368104.

Adding to 102003644 its reverse (446300201), we get a palindrome (548303845).

The spelling of 102003644 in words is "one hundred two million, three thousand, six hundred forty-four".