153021961 has 2 divisors, whose sum is σ = 153021962. Its totient is φ = 153021960.

The previous prime is 153021949. The next prime is 153022003. The reversal of 153021961 is 169120351.

153021961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133263936 + 19758025 = 11544^2 + 4445^2 .

It is an emirp because it is prime and its reverse (169120351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 153021961 - 2⁷ = 153021833 is a prime.

It is not a weakly prime, because it can be changed into another prime (153021941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76510980 + 76510981.

It is an arithmetic number, because the mean of its divisors is an integer number (76510981).

Almost surely, 2^153021961 is an apocalyptic number.

It is an amenable number.

153021961 is a deficient number, since it is larger than the sum of its proper divisors (1).

153021961 is an equidigital number, since it uses as much as digits as its factorization.

153021961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 153021961 is about 12370.2045658105. The cubic root of 153021961 is about 534.8737128771.

The spelling of 153021961 in words is "one hundred fifty-three million, twenty-one thousand, nine hundred sixty-one".