150889721 has 4 divisors (see below), whose sum is σ = 151024500. Its totient is φ = 150754944.

The previous prime is 150889667. The next prime is 150889733. The reversal of 150889721 is 127988051.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127988051 = 59 ⋅2169289.

It can be written as a sum of positive squares in 2 ways, for example, as 3534400 + 147355321 = 1880^2 + 12139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-150889721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150889771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65696 + ... + 67953.

It is an arithmetic number, because the mean of its divisors is an integer number (37756125).

Almost surely, 2^150889721 is an apocalyptic number.

It is an amenable number.

150889721 is a deficient number, since it is larger than the sum of its proper divisors (134779).

150889721 is a wasteful number, since it uses less digits than its factorization.

150889721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134778.

The product of its (nonzero) digits is 40320, while the sum is 41.

The square root of 150889721 is about 12283.7177189970. The cubic root of 150889721 is about 532.3777361890.

The spelling of 150889721 in words is "one hundred fifty million, eight hundred eighty-nine thousand, seven hundred twenty-one".