101689889 has 16 divisors (see below), whose sum is σ = 120508416. Its totient is φ = 83970000.

The previous prime is 101689873. The next prime is 101689891. The reversal of 101689889 is 988986101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 101689889 - 2⁴ = 101689873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101689829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53534 + ... + 55400.

It is an arithmetic number, because the mean of its divisors is an integer number (7531776).

Almost surely, 2^101689889 is an apocalyptic number.

It is an amenable number.

101689889 is a deficient number, since it is larger than the sum of its proper divisors (18818527).

101689889 is a wasteful number, since it uses less digits than its factorization.

101689889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156.

The product of its (nonzero) digits is 248832, while the sum is 50.

The square root of 101689889 is about 10084.1404690732. The cubic root of 101689889 is about 466.7588821734.

The spelling of 101689889 in words is "one hundred one million, six hundred eighty-nine thousand, eight hundred eighty-nine".