156903641 has 2 divisors, whose sum is σ = 156903642. Its totient is φ = 156903640.

The previous prime is 156903589. The next prime is 156903673. The reversal of 156903641 is 146309651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137358400 + 19545241 = 11720^2 + 4421^2 .

It is a cyclic number.

It is not a de Polignac number, because 156903641 - 2¹⁰ = 156902617 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (156903841) 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, 78451820 + 78451821.

It is an arithmetic number, because the mean of its divisors is an integer number (78451821).

Almost surely, 2^156903641 is an apocalyptic number.

It is an amenable number.

156903641 is a deficient number, since it is larger than the sum of its proper divisors (1).

156903641 is an equidigital number, since it uses as much as digits as its factorization.

156903641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 156903641 is about 12526.1183532649. The cubic root of 156903641 is about 539.3586819569.

The spelling of 156903641 in words is "one hundred fifty-six million, nine hundred three thousand, six hundred forty-one".