83561903 has 2 divisors, whose sum is σ = 83561904. Its totient is φ = 83561902.

The previous prime is 83561897. The next prime is 83561909. The reversal of 83561903 is 30916538.

It is a balanced prime because it is at equal distance from previous prime (83561897) and next prime (83561909).

It is a cyclic number.

It is not a de Polignac number, because 83561903 - 2²⁶ = 16453039 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83561909) 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 as a sum of consecutive naturals, namely, 41780951 + 41780952.

It is an arithmetic number, because the mean of its divisors is an integer number (41780952).

Almost surely, 2^83561903 is an apocalyptic number.

83561903 is a deficient number, since it is larger than the sum of its proper divisors (1).

83561903 is an equidigital number, since it uses as much as digits as its factorization.

83561903 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 83561903 is about 9141.2199951648. The cubic root of 83561903 is about 437.1892157994.

The spelling of 83561903 in words is "eighty-three million, five hundred sixty-one thousand, nine hundred three".