151968689 has 4 divisors (see below), whose sum is σ = 151993380. Its totient is φ = 151944000.

The previous prime is 151968667. The next prime is 151968697. The reversal of 151968689 is 986869151.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 77440000 + 74528689 = 8800^2 + 8633^2 .

It is a cyclic number.

It is not a de Polignac number, because 151968689 - 2⁸ = 151968433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 151968689.

It is not an unprimeable number, because it can be changed into a prime (151968589) 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, 5189 + ... + 18189.

It is an arithmetic number, because the mean of its divisors is an integer number (37998345).

Almost surely, 2^151968689 is an apocalyptic number.

It is an amenable number.

151968689 is a deficient number, since it is larger than the sum of its proper divisors (24691).

151968689 is a wasteful number, since it uses less digits than its factorization.

151968689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24690.

The product of its digits is 933120, while the sum is 53.

The square root of 151968689 is about 12327.5581118079. The cubic root of 151968689 is about 533.6436823489.

The spelling of 151968689 in words is "one hundred fifty-one million, nine hundred sixty-eight thousand, six hundred eighty-nine".