101387689 has 8 divisors (see below), whose sum is σ = 109666760. Its totient is φ = 93177216.

The previous prime is 101387687. The next prime is 101387707. The reversal of 101387689 is 986783101.

It can be written as a sum of positive squares in 4 ways, for example, as 37515625 + 63872064 = 6125^2 + 7992^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101387689 - 2¹ = 101387687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101387681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14052 + ... + 20005.

It is an arithmetic number, because the mean of its divisors is an integer number (13708345).

Almost surely, 2^101387689 is an apocalyptic number.

It is an amenable number.

101387689 is a deficient number, since it is larger than the sum of its proper divisors (8279071).

101387689 is a wasteful number, since it uses less digits than its factorization.

101387689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34299.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 101387689 is about 10069.1453957126. The cubic root of 101387689 is about 466.2960551267.

The spelling of 101387689 in words is "one hundred one million, three hundred eighty-seven thousand, six hundred eighty-nine".