150768721 has 2 divisors, whose sum is σ = 150768722. Its totient is φ = 150768720.

The previous prime is 150768719. The next prime is 150768731. The reversal of 150768721 is 127867051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150185025 + 583696 = 12255^2 + 764^2 .

It is a cyclic number.

It is not a de Polignac number, because 150768721 - 2¹ = 150768719 is a prime.

Together with 150768719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (150768701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75384360 + 75384361.

It is an arithmetic number, because the mean of its divisors is an integer number (75384361).

Almost surely, 2^150768721 is an apocalyptic number.

It is an amenable number.

150768721 is a deficient number, since it is larger than the sum of its proper divisors (1).

150768721 is an equidigital number, since it uses as much as digits as its factorization.

150768721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 37.

The square root of 150768721 is about 12278.7915121970. The cubic root of 150768721 is about 532.2353917615.

The spelling of 150768721 in words is "one hundred fifty million, seven hundred sixty-eight thousand, seven hundred twenty-one".