101988685 has 4 divisors (see below), whose sum is σ = 122386428. Its totient is φ = 81590944.

The previous prime is 101988659. The next prime is 101988701. The reversal of 101988685 is 586889101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80514729 + 21473956 = 8973^2 + 4634^2 .

It is a cyclic number.

It is not a de Polignac number, because 101988685 - 2¹³ = 101980493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10198864 + ... + 10198873.

It is an arithmetic number, because the mean of its divisors is an integer number (30596607).

Almost surely, 2^101988685 is an apocalyptic number.

It is an amenable number.

101988685 is a deficient number, since it is larger than the sum of its proper divisors (20397743).

101988685 is an equidigital number, since it uses as much as digits as its factorization.

101988685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20397742.

The product of its (nonzero) digits is 138240, while the sum is 46.

The square root of 101988685 is about 10098.9447468535. The cubic root of 101988685 is about 467.2155952687.

The spelling of 101988685 in words is "one hundred one million, nine hundred eighty-eight thousand, six hundred eighty-five".