123101989 has 8 divisors (see below), whose sum is σ = 124351488. Its totient is φ = 121857120.

The previous prime is 123101971. The next prime is 123101999. The reversal of 123101989 is 989101321.

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 123101989 - 2¹³ = 123093797 is a prime.

It is a super-2 number, since 2×123101989² = 30308199391512242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123101929) 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, 77574 + ... + 79144.

It is an arithmetic number, because the mean of its divisors is an integer number (15543936).

Almost surely, 2^123101989 is an apocalyptic number.

It is an amenable number.

123101989 is a deficient number, since it is larger than the sum of its proper divisors (1249499).

123101989 is a wasteful number, since it uses less digits than its factorization.

123101989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 123101989 is about 11095.1335728778. The cubic root of 123101989 is about 497.4564008155.

The spelling of 123101989 in words is "one hundred twenty-three million, one hundred one thousand, nine hundred eighty-nine".