102029905 has 16 divisors (see below), whose sum is σ = 132367680. Its totient is φ = 75235392.

The previous prime is 102029899. The next prime is 102029923. The reversal of 102029905 is 509920201.

It is a cyclic number.

It is not a de Polignac number, because 102029905 - 2¹¹ = 102027857 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10999 + ... + 18028.

It is an arithmetic number, because the mean of its divisors is an integer number (8272980).

Almost surely, 2^102029905 is an apocalyptic number.

It is an amenable number.

102029905 is a deficient number, since it is larger than the sum of its proper divisors (30337775).

102029905 is a wasteful number, since it uses less digits than its factorization.

102029905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29088.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 102029905 is about 10100.9853479747. The cubic root of 102029905 is about 467.2785304622.

The spelling of 102029905 in words is "one hundred two million, twenty-nine thousand, nine hundred five".