101689101 has 10 divisors (see below), whose sum is σ = 151906062. Its totient is φ = 67792680.

The previous prime is 101689099. The next prime is 101689117. The reversal of 101689101 is 101986101.

It can be written as a sum of positive squares in only one way, i.e., 73874025 + 27815076 = 8595^2 + 5274^2 .

It is not a de Polignac number, because 101689101 - 2¹ = 101689099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

101689101 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101689151) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 627630 + ... + 627791.

Almost surely, 2^101689101 is an apocalyptic number.

It is an amenable number.

101689101 is a deficient number, since it is larger than the sum of its proper divisors (50216961).

101689101 is an equidigital number, since it uses as much as digits as its factorization.

101689101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1255433 (or 1255424 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 27.

The square root of 101689101 is about 10084.1013977449. The cubic root of 101689101 is about 466.7576765244.

The spelling of 101689101 in words is "one hundred one million, six hundred eighty-nine thousand, one hundred one".