151989 has 8 divisors (see below), whose sum is σ = 209760. Its totient is φ = 97776.

The previous prime is 151969. The next prime is 152003. The reversal of 151989 is 989151.

151989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 151989 - 2⁸ = 151733 is a prime.

It is a super-2 number, since 2×151989² = 46201312242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 151989.

It is not an unprimeable number, because it can be changed into a prime (151909) 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, 787 + ... + 960.

It is an arithmetic number, because the mean of its divisors is an integer number (26220).

2¹⁵¹⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

151989 is a deficient number, since it is larger than the sum of its proper divisors (57771).

151989 is a wasteful number, since it uses less digits than its factorization.

151989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1779.

The product of its digits is 3240, while the sum is 33.

The square root of 151989 is about 389.8576663348. The cubic root of 151989 is about 53.3667455566.

The spelling of 151989 in words is "one hundred fifty-one thousand, nine hundred eighty-nine".