102204047 has 4 divisors (see below), whose sum is σ = 111495336. Its totient is φ = 92912760.

The previous prime is 102204043. The next prime is 102204071. The reversal of 102204047 is 740402201.

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

It is a cyclic number.

It is not a de Polignac number, because 102204047 - 2² = 102204043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102204041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4645628 + ... + 4645649.

It is an arithmetic number, because the mean of its divisors is an integer number (27873834).

Almost surely, 2^102204047 is an apocalyptic number.

102204047 is a deficient number, since it is larger than the sum of its proper divisors (9291289).

102204047 is an equidigital number, since it uses as much as digits as its factorization.

102204047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9291288.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 102204047 is about 10109.6017231145. The cubic root of 102204047 is about 467.5442256578.

Adding to 102204047 its reverse (740402201), we get a palindrome (842606248).

The spelling of 102204047 in words is "one hundred two million, two hundred four thousand, forty-seven".