101159989 has 4 divisors (see below), whose sum is σ = 115611424. Its totient is φ = 86708556.

The previous prime is 101159983. The next prime is 101159999. The reversal of 101159989 is 989951101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 101159989 - 2¹¹ = 101157941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101159983) 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, 7225707 + ... + 7225720.

It is an arithmetic number, because the mean of its divisors is an integer number (28902856).

Almost surely, 2^101159989 is an apocalyptic number.

It is an amenable number.

101159989 is a deficient number, since it is larger than the sum of its proper divisors (14451435).

101159989 is an equidigital number, since it uses as much as digits as its factorization.

101159989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14451434.

The product of its (nonzero) digits is 29160, while the sum is 43.

The square root of 101159989 is about 10057.8322217066. The cubic root of 101159989 is about 465.9467188433.

The spelling of 101159989 in words is "one hundred one million, one hundred fifty-nine thousand, nine hundred eighty-nine".