150649921 has 2 divisors, whose sum is σ = 150649922. Its totient is φ = 150649920.

The previous prime is 150649909. The next prime is 150649927. The reversal of 150649921 is 129946051.

150649921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138650625 + 11999296 = 11775^2 + 3464^2 .

It is a cyclic number.

It is not a de Polignac number, because 150649921 - 2⁹ = 150649409 is a prime.

It is not a weakly prime, because it can be changed into another prime (150649927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75324960 + 75324961.

It is an arithmetic number, because the mean of its divisors is an integer number (75324961).

Almost surely, 2^150649921 is an apocalyptic number.

It is an amenable number.

150649921 is a deficient number, since it is larger than the sum of its proper divisors (1).

150649921 is an equidigital number, since it uses as much as digits as its factorization.

150649921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 150649921 is about 12273.9529492336. The cubic root of 150649921 is about 532.0955613005.

The spelling of 150649921 in words is "one hundred fifty million, six hundred forty-nine thousand, nine hundred twenty-one".