101609887 has 4 divisors (see below), whose sum is σ = 102177720. Its totient is φ = 101042056.

The previous prime is 101609869. The next prime is 101609917. The reversal of 101609887 is 788906101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 788906101 = 701 ⋅1125401.

It is a cyclic number.

It is not a de Polignac number, because 101609887 - 2⁷ = 101609759 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101609857) 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, 283648 + ... + 284005.

It is an arithmetic number, because the mean of its divisors is an integer number (25544430).

Almost surely, 2^101609887 is an apocalyptic number.

101609887 is a deficient number, since it is larger than the sum of its proper divisors (567833).

101609887 is an equidigital number, since it uses as much as digits as its factorization.

101609887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567832.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 101609887 is about 10080.1729647859. The cubic root of 101609887 is about 466.6364463991.

The spelling of 101609887 in words is "one hundred one million, six hundred nine thousand, eight hundred eighty-seven".