102661889 has 8 divisors (see below), whose sum is σ = 113667168. Its totient is φ = 91935360.

The previous prime is 102661879. The next prime is 102661891. The reversal of 102661889 is 988166201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102661889 - 2²⁰ = 101613313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102661849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68912 + ... + 70385.

It is an arithmetic number, because the mean of its divisors is an integer number (14208396).

Almost surely, 2^102661889 is an apocalyptic number.

It is an amenable number.

102661889 is a deficient number, since it is larger than the sum of its proper divisors (11005279).

102661889 is a wasteful number, since it uses less digits than its factorization.

102661889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139375.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 102661889 is about 10132.2203390965. The cubic root of 102661889 is about 468.2413361285.

The spelling of 102661889 in words is "one hundred two million, six hundred sixty-one thousand, eight hundred eighty-nine".