981233783 has 2 divisors, whose sum is σ = 981233784. Its totient is φ = 981233782.

The previous prime is 981233753. The next prime is 981233831. The reversal of 981233783 is 387332189.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 981233783 - 2²⁰ = 980185207 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 (981233753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490616891 + 490616892.

It is an arithmetic number, because the mean of its divisors is an integer number (490616892).

Almost surely, 2^981233783 is an apocalyptic number.

981233783 is a deficient number, since it is larger than the sum of its proper divisors (1).

981233783 is an equidigital number, since it uses as much as digits as its factorization.

981233783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 981233783 is about 31324.6513627846. The cubic root of 981233783 is about 993.7050511004.

The spelling of 981233783 in words is "nine hundred eighty-one million, two hundred thirty-three thousand, seven hundred eighty-three".