102189657 has 16 divisors (see below), whose sum is σ = 143640320. Its totient is φ = 64443600.

The previous prime is 102189653. The next prime is 102189697. The reversal of 102189657 is 756981201.

It is not a de Polignac number, because 102189657 - 2² = 102189653 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102189653) 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 15 ways as a sum of consecutive naturals, for example, 65982 + ... + 67512.

It is an arithmetic number, because the mean of its divisors is an integer number (8977520).

Almost surely, 2^102189657 is an apocalyptic number.

It is an amenable number.

102189657 is a deficient number, since it is larger than the sum of its proper divisors (41450663).

102189657 is a wasteful number, since it uses less digits than its factorization.

102189657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2724.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 102189657 is about 10108.8899984123. The cubic root of 102189657 is about 467.5222817218.

The spelling of 102189657 in words is "one hundred two million, one hundred eighty-nine thousand, six hundred fifty-seven".