101689811 has 4 divisors (see below), whose sum is σ = 103853472. Its totient is φ = 99526152.

The previous prime is 101689793. The next prime is 101689817. The reversal of 101689811 is 118986101.

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 101689811 - 2²⁶ = 34580947 is a prime.

It is a super-2 number, since 2×101689811² = 20681635322431442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101689817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081760 + ... + 1081853.

It is an arithmetic number, because the mean of its divisors is an integer number (25963368).

Almost surely, 2^101689811 is an apocalyptic number.

101689811 is a deficient number, since it is larger than the sum of its proper divisors (2163661).

101689811 is an equidigital number, since it uses as much as digits as its factorization.

101689811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2163660.

The product of its (nonzero) digits is 3456, while the sum is 35.

The square root of 101689811 is about 10084.1366016134. The cubic root of 101689811 is about 466.7587628328.

The spelling of 101689811 in words is "one hundred one million, six hundred eighty-nine thousand, eight hundred eleven".